HM3: Color layout tweak

With thanks to Damien for reminding me it needed work, I've reorganized the color swatch layout for the HM3 Alpha. They're now in Roy G. Biv order, except for browns and skin tones after, and grayscale before.

You'll note that the last four rows look awfully similar. I'm open to suggestions for replacement colors to take up at least one of those four rows (which are basically repeats of the skin tones). I do want probably a whole row of browns in addition to the skin tones, for leather and such. But that leaves a lot of others to fill.