Ground study

Move the board colour and watch the shipped legibility laws pass or fail. Palette read straight from renderer.ts; contrast maths from depositcoal.test.ts.

Presets

Board

#1b222b

Laws

Ore separation

Only coal has a shipped test (depositcoal.test.ts, ≥3:1 for its light rim). The rest are shown because they were all toned against a dark board — quartz is "the only pale ground on a dark board" and iridium "the only green on the map." Watch what a light board does to them.