Puzzle answer.

[fings]

If you have given up on this post's game, you can find the solution within the cut text.


Thanks for playing!

The rule: Every color that has a below baseline decender (g,j,p,q,y) when written in lower case goes in one pile, all without in another.

Thus

red vermillion blue brown black chartreuse lavender

green purple beige yellow orange periwinkle pink magenta turquoise gold

This is a really hard one to solve when you are doing it with a group of people verbally. Written, it's not too bad.