Chroma

A colour fills the screen for three seconds, then it is gone. You rebuild it blind on three dials — how light it was, how vivid, and which hue — and commit one answer. Five rounds, and the score is how close the two actually look rather than how close the numbers are.

Everyone gets the same five colours on the same day, worked out from the date itself, so there is nothing to sync and no server to ask. Your streak lives in your browser and nowhere else. One session a day, and when it is done it is done until the next one.

Only the first of its two modes is built. Hue, the recall game described above, is complete. Pigment — where the target stays visible and you have to reach it by mixing, in as few mixes as you can — is designed and does not exist yet.

A game about telling colours apart is partly inaccessible to anyone with colour vision deficiency, and no amount of interface work changes that. What can be done is done: every result is given as a number and a word as well as a swatch, nothing in the interface depends on colour alone, and the shareable summary uses shapes rather than coloured squares.