If I understand correctly, you’re not able to get the color light blue pasted on the Italian flags/units in paint (it always shifts to grey).
This is because the ToolPieces.bmp-file is saved as an 8-bit bmp, allowing only 256 different tones of colors. If I get wikipedia correctly, the tones of these colors depend on the “palette” being used. I have no idea what that exact palette is with the ToolPieces.bmp from ABattleMap, but all I know is I’m only able to get 1 blue color: 00 00 FF (in RGB).
Workaround: save the ToolPieces.bmp as a 24-bit bmp (Paint has this option). Now you should be able to use a much wider range of colors in Paint, and as far as I can see, ABattleMap’s just fine with this. I don’t think there’s any real reason why we should keep the 8-bit mode, but since I didn’t see a problem, I just kept it that way to be safe. The only drawback is the ToolPieces.bmp file will now weigh an astonishing 44kb instead of the more moderate 16kb :-D
Is this what you needed?