"All 6 colors are present."
"There are 5 colors in the first row."
"Pink only appears on the bottom row."
"Red and Pink are in the corners of the\nsame row."
These four are a good place to start, if this helps.
After a shamefully long time (during which I tried to brute force the code, twice), I finally got to the color part, and let me tell ya. This part. I cannot for the life of me get it all the rules to mesh together. I think I've got it worked out, for the most part, but that one of there are only two colors that appear once or whatever always trips me up. *Edit* yeah, after scrolling through the other replies, which I probably should have done from the get-go, I found that guy who posts a pic and answers it. I would have never gotten that. I was thinking mirrored like there's a collum on the left side and a collum on the right. Anyways, awesome game.