A game of color harmony.
Spectralopus is a tile-laying strategy game where the words are palettes. Place colored tiles in a row or column on the 9×9 board. The hues you arrange together must form a recognized harmony — a relationship from color theory — or the move is rejected.
You don't need to know color theory to start. Spectralopus teaches you the wheel as you play. Within a few rounds you'll start to see palettes everywhere.