/3/ - 3DCG

>>978243
Here's the spectrum textures just in case none of that made sense. Each strip is its own texture. UVs are scaled to 0 and just placed at the left most edge. Then I randomly offset them horizontally to pick a color. Color A just picks from the top band, while color B picks from one of the bottom 3 bands randomly. Since the UVs for color A and B are in the same spot and offset by the same amount, you get colors that go together no matter what.
Hopefully that makes a bit more sense than before.