Note that the colours were added mostly for aesthetics/choice. The only reason I tinkered with it, apart from wanting some key colours to choose from, is that one of the colours had been mistyped, with a component outside the 0-255 range.
Did you check the PC_Equipment.txt file before archiving it? Some of the gun clip names are redundant (i.e. rifle clips with same stats, but different names so they can't be interchanged). I believe somebody rectified this through a patch that has already been applied.