diff --git a/calc.go b/calc.go
index 70b54095..4b17d84e 100644
--- a/calc.go
+++ b/calc.go
@@ -13489,7 +13489,7 @@ func (fn *formulaFuncs) LENB(argsList *list.List) formulaArg {
 		return newErrorFormulaArg(formulaErrorVALUE, "LENB requires 1 string argument")
 	}
 	bytes := 0
-	for _, r := range []rune(argsList.Front().Value.(formulaArg).String) {
+	for _, r := range argsList.Front().Value.(formulaArg).Value() {
 		b := utf8.RuneLen(r)
 		if b == 1 {
 			bytes++
diff --git a/cell.go b/cell.go
index a263b84d..a23296b6 100644
--- a/cell.go
+++ b/cell.go
@@ -843,7 +843,7 @@ type HyperlinkOpts struct {
 //	}
 //	// Set underline and font color style for the cell.
 //	style, err := f.NewStyle(&excelize.Style{
-//	    Font: &excelize.Font{Color: "#1265BE", Underline: "single"},
+//	    Font: &excelize.Font{Color: "1265BE", Underline: "single"},
 //	})
 //	if err != nil {
 //	    fmt.Println(err)
diff --git a/cell_test.go b/cell_test.go
index cee21889..210918cf 100644
--- a/cell_test.go
+++ b/cell_test.go
@@ -37,7 +37,7 @@ func TestConcurrency(t *testing.T) {
 				uint64(1<<32 - 1), true, complex64(5 + 10i),
 			}))
 			// Concurrency create style
-			style, err := f.NewStyle(&Style{Font: &Font{Color: "#1265BE", Underline: "single"}})
+			style, err := f.NewStyle(&Style{Font: &Font{Color: "1265BE", Underline: "single"}})
 			assert.NoError(t, err)
 			// Concurrency set cell style
 			assert.NoError(t, f.SetCellStyle("Sheet1", "A3", "A3", style))
@@ -948,3 +948,7 @@ func TestSharedStringsError(t *testing.T) {
 		return assert.NoError(t, os.Remove(v.(string)))
 	})
 }
+
+func TestSIString(t *testing.T) {
+	assert.Empty(t, xlsxSI{}.String())
+}
diff --git a/chart_test.go b/chart_test.go
index 14adb062..1f265a3f 100644
--- a/chart_test.go
+++ b/chart_test.go
@@ -200,7 +200,7 @@ func TestAddChart(t *testing.T) {
 		sheetName, cell string
 		opts            *Chart
 	}{
-		{sheetName: "Sheet1", cell: "P1", opts: &Chart{Type: "col", Series: series, Format: format, Legend: ChartLegend{Position: "none", ShowLegendKey: true}, Title: ChartTitle{Name: "2D Column Chart"}, PlotArea: plotArea, ShowBlanksAs: "zero", XAxis: ChartAxis{Font: Font{Bold: true, Italic: true, Underline: "dbl", Color: "#000000"}}, YAxis: ChartAxis{Font: Font{Bold: false, Italic: false, Underline: "sng", Color: "#777777"}}}},
+		{sheetName: "Sheet1", cell: "P1", opts: &Chart{Type: "col", Series: series, Format: format, Legend: ChartLegend{Position: "none", ShowLegendKey: true}, Title: ChartTitle{Name: "2D Column Chart"}, PlotArea: plotArea, ShowBlanksAs: "zero", XAxis: ChartAxis{Font: Font{Bold: true, Italic: true, Underline: "dbl", Color: "000000"}}, YAxis: ChartAxis{Font: Font{Bold: false, Italic: false, Underline: "sng", Color: "777777"}}}},
 		{sheetName: "Sheet1", cell: "X1", opts: &Chart{Type: "colStacked", Series: series, Format: format, Legend: legend, Title: ChartTitle{Name: "2D Stacked Column Chart"}, PlotArea: plotArea, ShowBlanksAs: "zero"}},
 		{sheetName: "Sheet1", cell: "P16", opts: &Chart{Type: "colPercentStacked", Series: series, Format: format, Legend: legend, Title: ChartTitle{Name: "100% Stacked Column Chart"}, PlotArea: plotArea, ShowBlanksAs: "zero"}},
 		{sheetName: "Sheet1", cell: "X16", opts: &Chart{Type: "col3DClustered", Series: series, Format: format, Legend: ChartLegend{Position: "bottom", ShowLegendKey: false}, Title: ChartTitle{Name: "3D Clustered Column Chart"}, PlotArea: plotArea, ShowBlanksAs: "zero"}},
diff --git a/col_test.go b/col_test.go
index 4debab0f..8e15bebc 100644
--- a/col_test.go
+++ b/col_test.go
@@ -320,7 +320,7 @@ func TestSetColStyle(t *testing.T) {
 	f := NewFile()
 	assert.NoError(t, f.SetCellValue("Sheet1", "B2", "Hello"))
 
-	styleID, err := f.NewStyle(&Style{Fill: Fill{Type: "pattern", Color: []string{"#94d3a2"}, Pattern: 1}})
+	styleID, err := f.NewStyle(&Style{Fill: Fill{Type: "pattern", Color: []string{"94D3A2"}, Pattern: 1}})
 	assert.NoError(t, err)
 	// Test set column style on not exists worksheet
 	assert.EqualError(t, f.SetColStyle("SheetN", "E", styleID), "sheet SheetN does not exist")
diff --git a/comment.go b/comment.go
index 8206e685..40912d07 100644
--- a/comment.go
+++ b/comment.go
@@ -228,8 +228,8 @@ func (f *File) addDrawingVML(commentID int, drawingVML, cell string, lineCount,
 					ID:          "_x0000_s1025",
 					Type:        "#_x0000_t202",
 					Style:       "position:absolute;73.5pt;width:108pt;height:59.25pt;z-index:1;visibility:hidden",
-					Fillcolor:   "#fbf6d6",
-					Strokecolor: "#edeaa1",
+					Fillcolor:   "#FBF6D6",
+					Strokecolor: "#EDEAA1",
 					Val:         v.Val,
 				}
 				vml.Shape = append(vml.Shape, s)
@@ -238,7 +238,7 @@ func (f *File) addDrawingVML(commentID int, drawingVML, cell string, lineCount,
 	}
 	sp := encodeShape{
 		Fill: &vFill{
-			Color2: "#fbfe82",
+			Color2: "#FBFE82",
 			Angle:  -180,
 			Type:   "gradient",
 			Fill: &oFill{
@@ -275,8 +275,8 @@ func (f *File) addDrawingVML(commentID int, drawingVML, cell string, lineCount,
 		ID:          "_x0000_s1025",
 		Type:        "#_x0000_t202",
 		Style:       "position:absolute;73.5pt;width:108pt;height:59.25pt;z-index:1;visibility:hidden",
-		Fillcolor:   "#fbf6d6",
-		Strokecolor: "#edeaa1",
+		Fillcolor:   "#FBF6D6",
+		Strokecolor: "#EDEAA1",
 		Val:         string(s[13 : len(s)-14]),
 	}
 	vml.Shape = append(vml.Shape, shape)
diff --git a/excelize_test.go b/excelize_test.go
index ea3a41bf..8d9bbc8a 100644
--- a/excelize_test.go
+++ b/excelize_test.go
@@ -677,11 +677,11 @@ func TestSetCellStyleBorder(t *testing.T) {
 	assert.NoError(t, err)
 	assert.NoError(t, f.SetCellStyle("Sheet1", "J21", "L25", style))
 
-	style, err = f.NewStyle(&Style{Border: []Border{{Type: "left", Color: "0000FF", Style: 2}, {Type: "top", Color: "00FF00", Style: 3}, {Type: "bottom", Color: "FFFF00", Style: 4}, {Type: "right", Color: "FF0000", Style: 5}, {Type: "diagonalDown", Color: "A020F0", Style: 6}, {Type: "diagonalUp", Color: "A020F0", Style: 7}}, Fill: Fill{Type: "gradient", Color: []string{"#FFFFFF", "#E0EBF5"}, Shading: 1}})
+	style, err = f.NewStyle(&Style{Border: []Border{{Type: "left", Color: "0000FF", Style: 2}, {Type: "top", Color: "00FF00", Style: 3}, {Type: "bottom", Color: "FFFF00", Style: 4}, {Type: "right", Color: "FF0000", Style: 5}, {Type: "diagonalDown", Color: "A020F0", Style: 6}, {Type: "diagonalUp", Color: "A020F0", Style: 7}}, Fill: Fill{Type: "gradient", Color: []string{"FFFFFF", "E0EBF5"}, Shading: 1}})
 	assert.NoError(t, err)
 	assert.NoError(t, f.SetCellStyle("Sheet1", "M28", "K24", style))
 
-	style, err = f.NewStyle(&Style{Border: []Border{{Type: "left", Color: "0000FF", Style: 2}, {Type: "top", Color: "00FF00", Style: 3}, {Type: "bottom", Color: "FFFF00", Style: 4}, {Type: "right", Color: "FF0000", Style: 5}, {Type: "diagonalDown", Color: "A020F0", Style: 6}, {Type: "diagonalUp", Color: "A020F0", Style: 7}}, Fill: Fill{Type: "gradient", Color: []string{"#FFFFFF", "#E0EBF5"}, Shading: 4}})
+	style, err = f.NewStyle(&Style{Border: []Border{{Type: "left", Color: "0000FF", Style: 2}, {Type: "top", Color: "00FF00", Style: 3}, {Type: "bottom", Color: "FFFF00", Style: 4}, {Type: "right", Color: "FF0000", Style: 5}, {Type: "diagonalDown", Color: "A020F0", Style: 6}, {Type: "diagonalUp", Color: "A020F0", Style: 7}}, Fill: Fill{Type: "gradient", Color: []string{"FFFFFF", "E0EBF5"}, Shading: 4}})
 	assert.NoError(t, err)
 	assert.NoError(t, f.SetCellStyle("Sheet1", "M28", "K24", style))
 
@@ -721,7 +721,7 @@ func TestSetCellStyleBorder(t *testing.T) {
 		},
 		Fill: Fill{
 			Type:    "pattern",
-			Color:   []string{"#E0EBF5"},
+			Color:   []string{"E0EBF5"},
 			Pattern: 1,
 		},
 	})
@@ -767,7 +767,7 @@ func TestSetCellStyleNumberFormat(t *testing.T) {
 			} else {
 				assert.NoError(t, f.SetCellValue("Sheet2", c, val))
 			}
-			style, err := f.NewStyle(&Style{Fill: Fill{Type: "gradient", Color: []string{"#FFFFFF", "#E0EBF5"}, Shading: 5}, NumFmt: d})
+			style, err := f.NewStyle(&Style{Fill: Fill{Type: "gradient", Color: []string{"FFFFFF", "E0EBF5"}, Shading: 5}, NumFmt: d})
 			if !assert.NoError(t, err) {
 				t.FailNow()
 			}
@@ -839,7 +839,7 @@ func TestSetCellStyleCustomNumberFormat(t *testing.T) {
 	style, err := f.NewStyle(&Style{CustomNumFmt: &customNumFmt})
 	assert.NoError(t, err)
 	assert.NoError(t, f.SetCellStyle("Sheet1", "A1", "A1", style))
-	style, err = f.NewStyle(&Style{CustomNumFmt: &customNumFmt, Font: &Font{Color: "#9A0511"}})
+	style, err = f.NewStyle(&Style{CustomNumFmt: &customNumFmt, Font: &Font{Color: "9A0511"}})
 	assert.NoError(t, err)
 	assert.NoError(t, f.SetCellStyle("Sheet1", "A2", "A2", style))
 
@@ -855,11 +855,11 @@ func TestSetCellStyleFill(t *testing.T) {
 
 	var style int
 	// Test set fill for cell with invalid parameter
-	style, err = f.NewStyle(&Style{Fill: Fill{Type: "gradient", Color: []string{"#FFFFFF", "#E0EBF5"}, Shading: 6}})
+	style, err = f.NewStyle(&Style{Fill: Fill{Type: "gradient", Color: []string{"FFFFFF", "E0EBF5"}, Shading: 6}})
 	assert.NoError(t, err)
 	assert.NoError(t, f.SetCellStyle("Sheet1", "O23", "O23", style))
 
-	style, err = f.NewStyle(&Style{Fill: Fill{Type: "gradient", Color: []string{"#FFFFFF"}, Shading: 1}})
+	style, err = f.NewStyle(&Style{Fill: Fill{Type: "gradient", Color: []string{"FFFFFF"}, Shading: 1}})
 	assert.NoError(t, err)
 	assert.NoError(t, f.SetCellStyle("Sheet1", "O23", "O23", style))
 
@@ -879,7 +879,7 @@ func TestSetCellStyleFont(t *testing.T) {
 	assert.NoError(t, err)
 
 	var style int
-	style, err = f.NewStyle(&Style{Font: &Font{Bold: true, Italic: true, Family: "Times New Roman", Size: 36, Color: "#777777", Underline: "single"}})
+	style, err = f.NewStyle(&Style{Font: &Font{Bold: true, Italic: true, Family: "Times New Roman", Size: 36, Color: "777777", Underline: "single"}})
 	assert.NoError(t, err)
 
 	assert.NoError(t, f.SetCellStyle("Sheet2", "A1", "A1", style))
@@ -899,7 +899,7 @@ func TestSetCellStyleFont(t *testing.T) {
 
 	assert.NoError(t, f.SetCellStyle("Sheet2", "A4", "A4", style))
 
-	style, err = f.NewStyle(&Style{Font: &Font{Color: "#777777", Strike: true}})
+	style, err = f.NewStyle(&Style{Font: &Font{Color: "777777", Strike: true}})
 	assert.NoError(t, err)
 
 	assert.NoError(t, f.SetCellStyle("Sheet2", "A5", "A5", style))
@@ -1002,19 +1002,19 @@ func TestConditionalFormat(t *testing.T) {
 	var format1, format2, format3, format4 int
 	var err error
 	// Rose format for bad conditional
-	format1, err = f.NewConditionalStyle(&Style{Font: &Font{Color: "#9A0511"}, Fill: Fill{Type: "pattern", Color: []string{"#FEC7CE"}, Pattern: 1}})
+	format1, err = f.NewConditionalStyle(&Style{Font: &Font{Color: "9A0511"}, Fill: Fill{Type: "pattern", Color: []string{"FEC7CE"}, Pattern: 1}})
 	assert.NoError(t, err)
 
 	// Light yellow format for neutral conditional
-	format2, err = f.NewConditionalStyle(&Style{Fill: Fill{Type: "pattern", Color: []string{"#FEEAA0"}, Pattern: 1}})
+	format2, err = f.NewConditionalStyle(&Style{Fill: Fill{Type: "pattern", Color: []string{"FEEAA0"}, Pattern: 1}})
 	assert.NoError(t, err)
 
 	// Light green format for good conditional
-	format3, err = f.NewConditionalStyle(&Style{Font: &Font{Color: "#09600B"}, Fill: Fill{Type: "pattern", Color: []string{"#C7EECF"}, Pattern: 1}})
+	format3, err = f.NewConditionalStyle(&Style{Font: &Font{Color: "09600B"}, Fill: Fill{Type: "pattern", Color: []string{"C7EECF"}, Pattern: 1}})
 	assert.NoError(t, err)
 
 	// conditional style with align and left border
-	format4, err = f.NewConditionalStyle(&Style{Alignment: &Alignment{WrapText: true}, Border: []Border{{Type: "left", Color: "#000000", Style: 1}}})
+	format4, err = f.NewConditionalStyle(&Style{Alignment: &Alignment{WrapText: true}, Border: []Border{{Type: "left", Color: "000000", Style: 1}}})
 	assert.NoError(t, err)
 
 	// Color scales: 2 color
@@ -1206,7 +1206,7 @@ func TestConditionalFormat(t *testing.T) {
 	f, err = OpenFile(filepath.Join("test", "Book1.xlsx"))
 	assert.NoError(t, err)
 
-	_, err = f.NewConditionalStyle(&Style{Font: &Font{Color: "#9A0511"}, Fill: Fill{Type: "", Color: []string{"#FEC7CE"}, Pattern: 1}})
+	_, err = f.NewConditionalStyle(&Style{Font: &Font{Color: "9A0511"}, Fill: Fill{Type: "", Color: []string{"FEC7CE"}, Pattern: 1}})
 	assert.NoError(t, err)
 	assert.NoError(t, f.Close())
 }
diff --git a/pivotTable_test.go b/pivotTable_test.go
index 520d56de..24ccb4a0 100644
--- a/pivotTable_test.go
+++ b/pivotTable_test.go
@@ -70,7 +70,7 @@ func TestAddPivotTable(t *testing.T) {
 	}))
 	assert.NoError(t, f.AddPivotTable(&PivotTableOptions{
 		DataRange:       "Sheet1!$A$1:$E$31",
-		PivotTableRange: "Sheet1!$G$39:$W$52",
+		PivotTableRange: "Sheet1!$G$42:$W$55",
 		Rows:            []PivotTableField{{Data: "Month"}},
 		Columns:         []PivotTableField{{Data: "Region", DefaultSubtotal: true}, {Data: "Year"}},
 		Data:            []PivotTableField{{Data: "Sales", Subtotal: "CountNums", Name: "Summarize by CountNums"}},
diff --git a/rows_test.go b/rows_test.go
index 95e59d99..8b5008f9 100644
--- a/rows_test.go
+++ b/rows_test.go
@@ -990,9 +990,9 @@ func TestCheckRow(t *testing.T) {
 
 func TestSetRowStyle(t *testing.T) {
 	f := NewFile()
-	style1, err := f.NewStyle(&Style{Fill: Fill{Type: "pattern", Color: []string{"#63BE7B"}, Pattern: 1}})
+	style1, err := f.NewStyle(&Style{Fill: Fill{Type: "pattern", Color: []string{"63BE7B"}, Pattern: 1}})
 	assert.NoError(t, err)
-	style2, err := f.NewStyle(&Style{Fill: Fill{Type: "pattern", Color: []string{"#E0EBF5"}, Pattern: 1}})
+	style2, err := f.NewStyle(&Style{Fill: Fill{Type: "pattern", Color: []string{"E0EBF5"}, Pattern: 1}})
 	assert.NoError(t, err)
 	assert.NoError(t, f.SetCellStyle("Sheet1", "B2", "B2", style1))
 	assert.EqualError(t, f.SetRowStyle("Sheet1", 5, -1, style2), newInvalidRowNumberError(-1).Error())
diff --git a/shape.go b/shape.go
index d194e557..b0d449b2 100644
--- a/shape.go
+++ b/shape.go
@@ -54,24 +54,24 @@ func parseShapeOptions(opts *Shape) (*Shape, error) {
 //	lineWidth := 1.2
 //	err := f.AddShape("Sheet1", "G6",
 //	    &excelize.Shape{
-//	        Type:  "rect",
-//	        Color: excelize.ShapeColor{Line: "#4286f4", Fill: "#8eb9ff"},
-//	        Paragraph: []excelize.ShapeParagraph{
+//	        Type: "rect",
+//	        Line: excelize.ShapeLine{Color: "4286F4", Width: &lineWidth},
+//	        Fill: excelize.Fill{Color: []string{"8EB9FF"}},
+//	        Paragraph: []excelize.RichTextRun{
 //	            {
 //	                Text: "Rectangle Shape",
-//	                Font: excelize.Font{
+//	                Font: &excelize.Font{
 //	                    Bold:      true,
 //	                    Italic:    true,
 //	                    Family:    "Times New Roman",
 //	                    Size:      18,
-//	                    Color:     "#777777",
+//	                    Color:     "777777",
 //	                    Underline: "sng",
 //	                },
 //	            },
 //	        },
 //	        Width:  180,
 //	        Height: 40,
-//	        Line:   excelize.ShapeLine{Width: &lineWidth},
 //	    },
 //	)
 //
@@ -352,6 +352,10 @@ func (f *File) addDrawingShape(sheet, drawingXML, cell string, opts *Shape) erro
 	to.RowOff = y2 * EMU
 	twoCellAnchor.From = &from
 	twoCellAnchor.To = &to
+	var solidColor string
+	if len(opts.Fill.Color) == 1 {
+		solidColor = opts.Fill.Color[0]
+	}
 	shape := xdrSp{
 		Macro: opts.Macro,
 		NvSpPr: &xdrNvSpPr{
@@ -369,9 +373,9 @@ func (f *File) addDrawingShape(sheet, drawingXML, cell string, opts *Shape) erro
 			},
 		},
 		Style: &xdrStyle{
-			LnRef:     setShapeRef(opts.Color.Line, 2),
-			FillRef:   setShapeRef(opts.Color.Fill, 1),
-			EffectRef: setShapeRef(opts.Color.Effect, 0),
+			LnRef:     setShapeRef(opts.Line.Color, 2),
+			FillRef:   setShapeRef(solidColor, 1),
+			EffectRef: setShapeRef("", 0),
 			FontRef: &aFontRef{
 				Idx: "minor",
 				SchemeClr: &attrValString{
@@ -399,15 +403,15 @@ func (f *File) addDrawingShape(sheet, drawingXML, cell string, opts *Shape) erro
 		return err
 	}
 	if len(opts.Paragraph) < 1 {
-		opts.Paragraph = []ShapeParagraph{
+		opts.Paragraph = []RichTextRun{
 			{
-				Font: Font{
+				Font: &Font{
 					Bold:      false,
 					Italic:    false,
 					Underline: "none",
 					Family:    defaultFont,
 					Size:      11,
-					Color:     "#000000",
+					Color:     "000000",
 				},
 				Text: " ",
 			},
@@ -415,7 +419,11 @@ func (f *File) addDrawingShape(sheet, drawingXML, cell string, opts *Shape) erro
 	}
 	for _, p := range opts.Paragraph {
 		u := "none"
-		if idx := inStrSlice(supportedDrawingUnderlineTypes, p.Font.Underline, true); idx != -1 {
+		font := &Font{}
+		if p.Font != nil {
+			font = p.Font
+		}
+		if idx := inStrSlice(supportedDrawingUnderlineTypes, font.Underline, true); idx != -1 {
 			u = supportedDrawingUnderlineTypes[idx]
 		}
 		text := p.Text
@@ -425,13 +433,13 @@ func (f *File) addDrawingShape(sheet, drawingXML, cell string, opts *Shape) erro
 		paragraph := &aP{
 			R: &aR{
 				RPr: aRPr{
-					I:       p.Font.Italic,
-					B:       p.Font.Bold,
+					I:       font.Italic,
+					B:       font.Bold,
 					Lang:    "en-US",
 					AltLang: "en-US",
 					U:       u,
-					Sz:      p.Font.Size * 100,
-					Latin:   &xlsxCTTextFont{Typeface: p.Font.Family},
+					Sz:      font.Size * 100,
+					Latin:   &xlsxCTTextFont{Typeface: font.Family},
 				},
 				T: text,
 			},
@@ -439,7 +447,7 @@ func (f *File) addDrawingShape(sheet, drawingXML, cell string, opts *Shape) erro
 				Lang: "en-US",
 			},
 		}
-		srgbClr := strings.ReplaceAll(strings.ToUpper(p.Font.Color), "#", "")
+		srgbClr := strings.ReplaceAll(strings.ToUpper(font.Color), "#", "")
 		if len(srgbClr) == 6 {
 			paragraph.R.RPr.SolidFill = &aSolidFill{
 				SrgbClr: &attrValString{
diff --git a/shape_test.go b/shape_test.go
index 43614086..c9ba9d90 100644
--- a/shape_test.go
+++ b/shape_test.go
@@ -14,26 +14,27 @@ func TestAddShape(t *testing.T) {
 	}
 	shape := &Shape{
 		Type: "rect",
-		Paragraph: []ShapeParagraph{
-			{Text: "Rectangle", Font: Font{Color: "CD5C5C"}},
-			{Text: "Shape", Font: Font{Bold: true, Color: "2980B9"}},
+		Paragraph: []RichTextRun{
+			{Text: "Rectangle", Font: &Font{Color: "CD5C5C"}},
+			{Text: "Shape", Font: &Font{Bold: true, Color: "2980B9"}},
 		},
 	}
 	assert.NoError(t, f.AddShape("Sheet1", "A30", shape))
-	assert.NoError(t, f.AddShape("Sheet1", "B30", &Shape{Type: "rect", Paragraph: []ShapeParagraph{{Text: "Rectangle"}, {}}}))
+	assert.NoError(t, f.AddShape("Sheet1", "B30", &Shape{Type: "rect", Paragraph: []RichTextRun{{Text: "Rectangle"}, {}}}))
 	assert.NoError(t, f.AddShape("Sheet1", "C30", &Shape{Type: "rect"}))
 	assert.EqualError(t, f.AddShape("Sheet3", "H1",
 		&Shape{
-			Type:  "ellipseRibbon",
-			Color: ShapeColor{Line: "#4286f4", Fill: "#8eb9ff"},
-			Paragraph: []ShapeParagraph{
+			Type: "ellipseRibbon",
+			Line: ShapeLine{Color: "4286F4"},
+			Fill: Fill{Color: []string{"8EB9FF"}},
+			Paragraph: []RichTextRun{
 				{
-					Font: Font{
+					Font: &Font{
 						Bold:      true,
 						Italic:    true,
 						Family:    "Times New Roman",
 						Size:      36,
-						Color:     "#777777",
+						Color:     "777777",
 						Underline: "single",
 					},
 				},
@@ -49,22 +50,22 @@ func TestAddShape(t *testing.T) {
 	lineWidth := 1.2
 	assert.NoError(t, f.AddShape("Sheet1", "A1",
 		&Shape{
-			Type:  "ellipseRibbon",
-			Color: ShapeColor{Line: "#4286f4", Fill: "#8eb9ff"},
-			Paragraph: []ShapeParagraph{
+			Type: "ellipseRibbon",
+			Line: ShapeLine{Color: "4286F4", Width: &lineWidth},
+			Fill: Fill{Color: []string{"8EB9FF"}},
+			Paragraph: []RichTextRun{
 				{
-					Font: Font{
+					Font: &Font{
 						Bold:      true,
 						Italic:    true,
 						Family:    "Times New Roman",
 						Size:      36,
-						Color:     "#777777",
+						Color:     "777777",
 						Underline: "single",
 					},
 				},
 			},
 			Height: 90,
-			Line:   ShapeLine{Width: &lineWidth},
 		}))
 	assert.NoError(t, f.SaveAs(filepath.Join("test", "TestAddShape2.xlsx")))
 	// Test add shape with invalid sheet name
@@ -72,12 +73,12 @@ func TestAddShape(t *testing.T) {
 	// Test add shape with unsupported charset style sheet
 	f.Styles = nil
 	f.Pkg.Store(defaultXMLPathStyles, MacintoshCyrillicCharset)
-	assert.EqualError(t, f.AddShape("Sheet1", "B30", &Shape{Type: "rect", Paragraph: []ShapeParagraph{{Text: "Rectangle"}, {}}}), "XML syntax error on line 1: invalid UTF-8")
+	assert.EqualError(t, f.AddShape("Sheet1", "B30", &Shape{Type: "rect", Paragraph: []RichTextRun{{Text: "Rectangle"}, {}}}), "XML syntax error on line 1: invalid UTF-8")
 	// Test add shape with unsupported charset content types
 	f = NewFile()
 	f.ContentTypes = nil
 	f.Pkg.Store(defaultXMLPathContentTypes, MacintoshCyrillicCharset)
-	assert.EqualError(t, f.AddShape("Sheet1", "B30", &Shape{Type: "rect", Paragraph: []ShapeParagraph{{Text: "Rectangle"}, {}}}), "XML syntax error on line 1: invalid UTF-8")
+	assert.EqualError(t, f.AddShape("Sheet1", "B30", &Shape{Type: "rect", Paragraph: []RichTextRun{{Text: "Rectangle"}, {}}}), "XML syntax error on line 1: invalid UTF-8")
 }
 
 func TestAddDrawingShape(t *testing.T) {
diff --git a/sheetpr_test.go b/sheetpr_test.go
index daf6c191..5491e786 100644
--- a/sheetpr_test.go
+++ b/sheetpr_test.go
@@ -58,7 +58,7 @@ func TestSetSheetProps(t *testing.T) {
 		AutoPageBreaks:                    enable,
 		FitToPage:                         enable,
 		TabColorIndexed:                   intPtr(1),
-		TabColorRGB:                       stringPtr("#FFFF00"),
+		TabColorRGB:                       stringPtr("FFFF00"),
 		TabColorTheme:                     intPtr(1),
 		TabColorTint:                      float64Ptr(1),
 		OutlineSummaryBelow:               enable,
@@ -79,7 +79,7 @@ func TestSetSheetProps(t *testing.T) {
 	ws.(*xlsxWorksheet).SheetPr = nil
 	assert.NoError(t, f.SetSheetProps("Sheet1", &SheetPropsOptions{FitToPage: enable}))
 	ws.(*xlsxWorksheet).SheetPr = nil
-	assert.NoError(t, f.SetSheetProps("Sheet1", &SheetPropsOptions{TabColorRGB: stringPtr("#FFFF00")}))
+	assert.NoError(t, f.SetSheetProps("Sheet1", &SheetPropsOptions{TabColorRGB: stringPtr("FFFF00")}))
 	ws.(*xlsxWorksheet).SheetPr = nil
 	assert.NoError(t, f.SetSheetProps("Sheet1", &SheetPropsOptions{TabColorTheme: intPtr(1)}))
 	ws.(*xlsxWorksheet).SheetPr = nil
diff --git a/sparkline.go b/sparkline.go
index b9879ac8..51bd1062 100644
--- a/sparkline.go
+++ b/sparkline.go
@@ -374,20 +374,21 @@ func (f *File) addSparklineGroupByStyle(ID int) *xlsxX14SparklineGroup {
 //
 // The following shows the formatting options of sparkline supported by excelize:
 //
-//	 Parameter | Description
-//	-----------+--------------------------------------------
-//	 Location  | Required, must have the same number with 'Range' parameter
-//	 Range     | Required, must have the same number with 'Location' parameter
-//	 Type      | Enumeration value: line, column, win_loss
-//	 Style     | Value range: 0 - 35
-//	 Hight     | Toggle sparkline high points
-//	 Low       | Toggle sparkline low points
-//	 First     | Toggle sparkline first points
-//	 Last      | Toggle sparkline last points
-//	 Negative  | Toggle sparkline negative points
-//	 Markers   | Toggle sparkline markers
-//	 ColorAxis | An RGB Color is specified as RRGGBB
-//	 Axis      | Show sparkline axis
+//	 Parameter   | Description
+//	-------------+--------------------------------------------
+//	 Location    | Required, must have the same number with 'Range' parameter
+//	 Range       | Required, must have the same number with 'Location' parameter
+//	 Type        | Enumeration value: line, column, win_loss
+//	 Style       | Value range: 0 - 35
+//	 Hight       | Toggle sparkline high points
+//	 Low         | Toggle sparkline low points
+//	 First       | Toggle sparkline first points
+//	 Last        | Toggle sparkline last points
+//	 Negative    | Toggle sparkline negative points
+//	 Markers     | Toggle sparkline markers
+//	 Axis        | Used to specify if show horizontal axis
+//	 Reverse     | Used to specify if enable plot data right-to-left
+//	 SeriesColor | An RGB Color is specified as RRGGBB
 func (f *File) AddSparkline(sheet string, opts *SparklineOptions) error {
 	var (
 		err                 error
diff --git a/sparkline_test.go b/sparkline_test.go
index b1d3d186..0d1511d0 100644
--- a/sparkline_test.go
+++ b/sparkline_test.go
@@ -136,7 +136,7 @@ func TestAddSparkline(t *testing.T) {
 		Location:    []string{"A18"},
 		Range:       []string{"Sheet3!A2:J2"},
 		Type:        "column",
-		SeriesColor: "#E965E0",
+		SeriesColor: "E965E0",
 	}))
 
 	assert.NoError(t, f.SetCellValue("Sheet1", "B20", "A win/loss sparkline."))
diff --git a/stream.go b/stream.go
index 7cab7305..0577a7c9 100644
--- a/stream.go
+++ b/stream.go
@@ -58,7 +58,7 @@ type StreamWriter struct {
 //	    fmt.Println(err)
 //	    return
 //	}
-//	styleID, err := file.NewStyle(&excelize.Style{Font: &excelize.Font{Color: "#777777"}})
+//	styleID, err := file.NewStyle(&excelize.Style{Font: &excelize.Font{Color: "777777"}})
 //	if err != nil {
 //	    fmt.Println(err)
 //	    return
diff --git a/stream_test.go b/stream_test.go
index 0e690552..da25bb9d 100644
--- a/stream_test.go
+++ b/stream_test.go
@@ -56,7 +56,7 @@ func TestStreamWriter(t *testing.T) {
 	assert.NoError(t, streamWriter.SetRow("A3", row))
 
 	// Test set cell with style and rich text
-	styleID, err := file.NewStyle(&Style{Font: &Font{Color: "#777777"}})
+	styleID, err := file.NewStyle(&Style{Font: &Font{Color: "777777"}})
 	assert.NoError(t, err)
 	assert.NoError(t, streamWriter.SetRow("A4", []interface{}{
 		Cell{StyleID: styleID},
@@ -67,8 +67,8 @@ func TestStreamWriter(t *testing.T) {
 		&Cell{StyleID: styleID, Value: "cell <>&'\""},
 		&Cell{Formula: "SUM(A10,B10)"},
 		[]RichTextRun{
-			{Text: "Rich ", Font: &Font{Color: "2354e8"}},
-			{Text: "Text", Font: &Font{Color: "e83723"}},
+			{Text: "Rich ", Font: &Font{Color: "2354E8"}},
+			{Text: "Text", Font: &Font{Color: "E83723"}},
 		},
 	}))
 	assert.NoError(t, streamWriter.SetRow("A6", []interface{}{time.Now()}))
@@ -318,9 +318,9 @@ func TestStreamSetRowWithStyle(t *testing.T) {
 		assert.NoError(t, file.Close())
 	}()
 	zeroStyleID := 0
-	grayStyleID, err := file.NewStyle(&Style{Font: &Font{Color: "#777777"}})
+	grayStyleID, err := file.NewStyle(&Style{Font: &Font{Color: "777777"}})
 	assert.NoError(t, err)
-	blueStyleID, err := file.NewStyle(&Style{Font: &Font{Color: "#0000FF"}})
+	blueStyleID, err := file.NewStyle(&Style{Font: &Font{Color: "0000FF"}})
 	assert.NoError(t, err)
 
 	streamWriter, err := file.NewStreamWriter("Sheet1")
diff --git a/styles.go b/styles.go
index 7483d30f..3c02e2d3 100644
--- a/styles.go
+++ b/styles.go
@@ -2702,7 +2702,7 @@ func (f *File) GetCellStyle(sheet, cell string) (int, error) {
 // Sheet1:
 //
 //	style, err := f.NewStyle(&excelize.Style{
-//	    Fill: excelize.Fill{Type: "gradient", Color: []string{"#FFFFFF", "#E0EBF5"}, Shading: 1},
+//	    Fill: excelize.Fill{Type: "gradient", Color: []string{"FFFFFF", "E0EBF5"}, Shading: 1},
 //	})
 //	if err != nil {
 //	    fmt.Println(err)
@@ -2712,7 +2712,7 @@ func (f *File) GetCellStyle(sheet, cell string) (int, error) {
 // Set solid style pattern fill for cell H9 on Sheet1:
 //
 //	style, err := f.NewStyle(&excelize.Style{
-//	    Fill: excelize.Fill{Type: "pattern", Color: []string{"#E0EBF5"}, Pattern: 1},
+//	    Fill: excelize.Fill{Type: "pattern", Color: []string{"E0EBF5"}, Pattern: 1},
 //	})
 //	if err != nil {
 //	    fmt.Println(err)
@@ -2758,7 +2758,7 @@ func (f *File) GetCellStyle(sheet, cell string) (int, error) {
 //	        Italic: true,
 //	        Family: "Times New Roman",
 //	        Size:   36,
-//	        Color:  "#777777",
+//	        Color:  "777777",
 //	    },
 //	})
 //	if err != nil {
@@ -2945,9 +2945,9 @@ func (f *File) SetCellStyle(sheet, hCell, vCell string, styleID int) error {
 //
 //	format, err := f.NewConditionalStyle(
 //	    &excelize.Style{
-//	        Font: &excelize.Font{Color: "#9A0511"},
+//	        Font: &excelize.Font{Color: "9A0511"},
 //	        Fill: excelize.Fill{
-//	            Type: "pattern", Color: []string{"#FEC7CE"}, Pattern: 1,
+//	            Type: "pattern", Color: []string{"FEC7CE"}, Pattern: 1,
 //	        },
 //	    },
 //	)
@@ -2972,7 +2972,7 @@ func (f *File) SetCellStyle(sheet, hCell, vCell string, styleID int) error {
 //	// Rose format for bad conditional.
 //	format1, err := f.NewConditionalStyle(
 //	    &excelize.Style{
-//	        Font: &excelize.Font{Color: "#9A0511"},
+//	        Font: &excelize.Font{Color: "9A0511"},
 //	        Fill: excelize.Fill{
 //	            Type: "pattern", Color: []string{"#FEC7CE"}, Pattern: 1,
 //	        },
@@ -2982,9 +2982,9 @@ func (f *File) SetCellStyle(sheet, hCell, vCell string, styleID int) error {
 //	// Light yellow format for neutral conditional.
 //	format2, err := f.NewConditionalStyle(
 //	    &excelize.Style{
-//	        Font: &excelize.Font{Color: "#9B5713"},
+//	        Font: &excelize.Font{Color: "9B5713"},
 //	        Fill: excelize.Fill{
-//	            Type: "pattern", Color: []string{"#FEEAA0"}, Pattern: 1,
+//	            Type: "pattern", Color: []string{"FEEAA0"}, Pattern: 1,
 //	        },
 //	    },
 //	)
@@ -2992,9 +2992,9 @@ func (f *File) SetCellStyle(sheet, hCell, vCell string, styleID int) error {
 //	// Light green format for good conditional.
 //	format3, err := f.NewConditionalStyle(
 //	    &excelize.Style{
-//	        Font: &excelize.Font{Color: "#09600B"},
+//	        Font: &excelize.Font{Color: "09600B"},
 //	        Fill: excelize.Fill{
-//	            Type: "pattern", Color: []string{"#C7EECF"}, Pattern: 1,
+//	            Type: "pattern", Color: []string{"C7EECF"}, Pattern: 1,
 //	        },
 //	    },
 //	)
diff --git a/styles_test.go b/styles_test.go
index ae7267a4..257547a6 100644
--- a/styles_test.go
+++ b/styles_test.go
@@ -20,7 +20,7 @@ func TestStyleFill(t *testing.T) {
 		expectFill: false,
 	}, {
 		label:      "fill",
-		format:     &Style{Fill: Fill{Type: "pattern", Pattern: 1, Color: []string{"#000000"}}},
+		format:     &Style{Fill: Fill{Type: "pattern", Pattern: 1, Color: []string{"000000"}}},
 		expectFill: true,
 	}}
 
@@ -39,9 +39,9 @@ func TestStyleFill(t *testing.T) {
 		}
 	}
 	f := NewFile()
-	styleID1, err := f.NewStyle(&Style{Fill: Fill{Type: "pattern", Pattern: 1, Color: []string{"#000000"}}})
+	styleID1, err := f.NewStyle(&Style{Fill: Fill{Type: "pattern", Pattern: 1, Color: []string{"000000"}}})
 	assert.NoError(t, err)
-	styleID2, err := f.NewStyle(&Style{Fill: Fill{Type: "pattern", Pattern: 1, Color: []string{"#000000"}}})
+	styleID2, err := f.NewStyle(&Style{Fill: Fill{Type: "pattern", Pattern: 1, Color: []string{"000000"}}})
 	assert.NoError(t, err)
 	assert.Equal(t, styleID1, styleID2)
 	assert.NoError(t, f.SaveAs(filepath.Join("test", "TestStyleFill.xlsx")))
@@ -230,7 +230,7 @@ func TestUnsetConditionalFormat(t *testing.T) {
 	f := NewFile()
 	assert.NoError(t, f.SetCellValue("Sheet1", "A1", 7))
 	assert.NoError(t, f.UnsetConditionalFormat("Sheet1", "A1:A10"))
-	format, err := f.NewConditionalStyle(&Style{Font: &Font{Color: "#9A0511"}, Fill: Fill{Type: "pattern", Color: []string{"#FEC7CE"}, Pattern: 1}})
+	format, err := f.NewConditionalStyle(&Style{Font: &Font{Color: "9A0511"}, Fill: Fill{Type: "pattern", Color: []string{"FEC7CE"}, Pattern: 1}})
 	assert.NoError(t, err)
 	assert.NoError(t, f.SetConditionalFormat("Sheet1", "A1:A10", []ConditionalFormatOptions{{Type: "cell", Criteria: ">", Format: format, Value: "6"}}))
 	assert.NoError(t, f.UnsetConditionalFormat("Sheet1", "A1:A10"))
@@ -246,12 +246,12 @@ func TestNewStyle(t *testing.T) {
 	f := NewFile()
 	for i := 0; i < 18; i++ {
 		_, err := f.NewStyle(&Style{
-			Fill: Fill{Type: "gradient", Color: []string{"#FFFFFF", "#4E71BE"}, Shading: i},
+			Fill: Fill{Type: "gradient", Color: []string{"FFFFFF", "4E71BE"}, Shading: i},
 		})
 		assert.NoError(t, err)
 	}
 	f = NewFile()
-	styleID, err := f.NewStyle(&Style{Font: &Font{Bold: true, Italic: true, Family: "Times New Roman", Size: 36, Color: "#777777"}})
+	styleID, err := f.NewStyle(&Style{Font: &Font{Bold: true, Italic: true, Family: "Times New Roman", Size: 36, Color: "777777"}})
 	assert.NoError(t, err)
 	styles, err := f.stylesReader()
 	assert.NoError(t, err)
@@ -360,7 +360,7 @@ func TestNewConditionalStyle(t *testing.T) {
 	// Test create conditional style with unsupported charset style sheet
 	f.Styles = nil
 	f.Pkg.Store(defaultXMLPathStyles, MacintoshCyrillicCharset)
-	_, err := f.NewConditionalStyle(&Style{Font: &Font{Color: "#9A0511"}, Fill: Fill{Type: "pattern", Color: []string{"#FEC7CE"}, Pattern: 1}})
+	_, err := f.NewConditionalStyle(&Style{Font: &Font{Color: "9A0511"}, Fill: Fill{Type: "pattern", Color: []string{"FEC7CE"}, Pattern: 1}})
 	assert.EqualError(t, err, "XML syntax error on line 1: invalid UTF-8")
 }
 
diff --git a/xmlDrawing.go b/xmlDrawing.go
index cc9585a6..3130833f 100644
--- a/xmlDrawing.go
+++ b/xmlDrawing.go
@@ -598,21 +598,14 @@ type GraphicOptions struct {
 
 // Shape directly maps the format settings of the shape.
 type Shape struct {
-	Macro     string
 	Type      string
+	Macro     string
 	Width     uint
 	Height    uint
 	Format    GraphicOptions
-	Color     ShapeColor
+	Fill      Fill
 	Line      ShapeLine
-	Paragraph []ShapeParagraph
-}
-
-// ShapeParagraph directly maps the format settings of the paragraph in
-// the shape.
-type ShapeParagraph struct {
-	Font Font
-	Text string
+	Paragraph []RichTextRun
 }
 
 // ShapeColor directly maps the color settings of the shape.
@@ -624,5 +617,6 @@ type ShapeColor struct {
 
 // ShapeLine directly maps the line settings of the shape.
 type ShapeLine struct {
+	Color string
 	Width *float64
 }