[Cerium]

I have taken this test several times over the years. I can score perfectly but if I make a mistake it is in the blue greens.

I have fun running different sorting algorithms on the tiles. The trick to getting a perfect score is doing a pass where you switch every pair of adjacent tiles. This will double the color delta on the edges if the tile is correct and halve the delta if the position was wrong. I always catch at least a blue or two on this pass.