Regruntled.com

CET suggested the palette for this pattern, based on my rainbow sudoku. The problem is that it is hard to find nine shades of blue that are easy to tell apart.

I think this pattern would be good on the bottom of a swimming pool. It could be manufactured as a puzzle, where the 20 or so clue tiles are glued to a mesh, and the other tiles are loose. The tile layer would have to solve the sudoku as he laid the tile.

I’ll do the same for anyone who sends me the hex values for nine colors. See colr.org for some tools.