First off, I finally think I have a chance to contribute. You guys are way too good.
I took the trigrid into photoshop to check the codes on the colors. The only triangles that have identical colors are the green and purple ones, as indicated in my attached image. I noticed that both colors included "1029" in their code. The only other color to include "1029" is the reddish purple triangle (circled).
Not sure if this is even helpful, but hey...