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Manipulating the Current Excel Color Palette
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Realizing that you re limited to using the colors in the color palette for a given workbook, you d probably be interested in a procedure that lets you display the colors in the current palette. The DisplayPalette procedure does just that.
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Sub DisplayPalette() Range( A1 ).Select ActiveCell.Formula = Color" ActiveCell.Offset(0, 1).Formula = Index" ActiveCell.Offset(1, 0).Activate For NumColor = 1 To 56 With ActiveCell.Interior .ColorIndex = NumColor .Pattern = xlSolid
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Part 4: Advanced VBA
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.PatternColorIndex = xlAutomatic End With ActiveCell.Offset(0, 1).Formula = NumColor ActiveCell.Offset(1, 0).Activate Next NumColor End Sub
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A version of this procedure was originally published on the Microsoft Knowledge Base at http://support.microsoft.com/support/kb/articles/q149/1/70.asp, but that ver sion of the program has a variable naming error that causes it to repeat the same color in all 56 cells. For debugging practice, run the code, find out what happens, and see if you can spot the error (provided the MSDN folks haven t corrected it).
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But what if the colors in the palette aren t what you need for your designs Many organiza tions have policies regarding the specific colors used in and appearance of their logos and official documents. Rather than be forced to work with colors that might not be exactly right, you can substitute a custom color for an existing color in the palette. To assign a new color to a slot in the Excel color palette from within the Excel program, follow these steps:
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1 Click Tools, Options, and then click the Color tab in the Options dialog box.
Part 4: Advanced VBA
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2 Click the square of the color you want to replace, and then click Modify. If you see the color you want in the Colors dialog box that appears, click it and then click OK. If you don t see the color you want, click the Custom tab. 3 Verify that RGB is selected in the Color Model list box. 4 Type the red, blue, and green components of your color in the appropriate boxes.
Formatting Excel Objects Assigning a color to a position in the color palette takes a single line of code in Excel VBA.
ActiveWorkbook.Colors (index) = RGB (red, green, blue)
But which colors should you substitute Any you won t use, of course, but there are actually a number of duplicate colors in the standard palette. Why No clue. But here are the repeats:
Color 5 (Blue) is repeated by Color 32. Color 6 (Yellow) is repeated by Color 27. Color 7 (Magenta) is repeated by Color 26. Color 8 (Cyan) is repeated by Color 28. Color 9 is repeated by Color 30. Color 13 is repeated by Color 29. Color 14 is repeated by Color 31. Color 18 is repeated by Color 54. Color 20 is repeated by Color 34.
You should probably replace the higher-numbered color first, especially if you re replacing a color that is named by one of the VBA color constants. The following procedure adds a new set of colors to the active workbook s palette using colors 26, 27, 28, 29, and 30:
Sub CustomColors() ActiveWorkbook.Colors(26) ActiveWorkbook.Colors(27) ActiveWorkbook.Colors(28) ActiveWorkbook.Colors(29) ActiveWorkbook.Colors(30) End Sub = = = = = RGB(240, RGB(138, RGB(165, RGB(255, RGB(199, 248, 255) 43, 226) 42, 42) 250, 205) 21, 133)
Now when you run the DisplayPalette procedure listed earlier in this chapter, you will see your new colors in positions 26, 27, 28, 29, and 30. Tip
Getting Around the Color Limit If you run into the 56-color barrier and don t have room to add colors for a corporate logo, you should insert the logo as a graphic. The colors in graphics don t count against the 56-color limit.
Changing the color palette of a workbook is relatively straightforward, but doing it for every workbook you create can be a pain if you try to do it by hand. However, you can write a short macro that copies the color palette from another workbook to the active workbook. Aside from the standard Sub and End Sub statements, you use the Workbooks collection s Colors property to copy the color palette from a workbook to the active workbook. If the workbook with the desired palette were named OurColors.xls, you would use the following procedure to copy the color palette over:
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