Instead of having so many lines like this to define the skin color...

	case SKINCOLOR_TEAL:
		// 5 color ramp
		for (i = 0; i < SKIN_RAMP_LENGTH; i++)
		{
			if (5*i/16 == 0)
				dest_colormap[starttranscolor + i] = 0xf7;
			else
				dest_colormap[starttranscolor + i] = (UINT8)(skinbasecolors[color - 1] + (5*i/SKIN_RAMP_LENGTH) - 1);
		}
		break;

Couldn't we have a table instead that looks more along the lines of this?

247,247,247,247,247,220,220,220,221,221,221,222,222,222,223,223,223
or if it needs to be in hex:
0xf7,0xf7,0xf7,0xf7,0xf7,0xdc,0xdc,0xdc,0xdd,0xdd,0xdd,0xde,0xde,0xde,0xdf,0xdf,0xdf