Has two different 16-color palettes

The source defines two different 16-color palettes. They are both displayed in the top row of "colors hint" and indeed look quite different.

It seems to me that one is used when the skin file contains keywords like "red", "green" etc., the other is used if they're referred to via "color1", "color2" etc.

They are just aliases of each other and should point to the same 16-color palette.