Haishoku

Haishoku (配色): Japanese for "color combination." Pronounced
hai-SHO-koo. Here, a daily camera-based color game.

Each morning, three colors are released. Use your phone's camera to
find them in the world around you — one at a time, no rush. The
app reads color in real time and tells you how close your match is.

The day's three colors are drawn from a hundred years of color
theory, beginning with Sanzo Wada's 1933 Dictionary of Colour
Combinations. The world is your studio.

— No accounts, no sign-in, nothing to set up. Open the app and
play.

— Nothing leaves your device. The camera samples color frame by
frame; we don't capture, save, or upload any photos.

— No ads, ever. No analytics. No tracking. We don't even have a
server.

— Color-vision aware. During first launch, you can tell Haishoku
how you see color — standard, protanopia, deuteranopia, or
tritanopia — and the app filters its daily palette to triads
distinguishable in your perceived color space. You can change this
any time from Settings.

— Optional daily reminder. One notification a day, at the time you
choose, only if you opt in. Off by default.

— Built by a small civic-tech operation. The whole thing runs on
your phone with palette data shipped in the app bundle.

Recent changes:
Haishoku now matches color more accurately (CIEDE2000), and Haishoku+ subscriptions are now tied to your Google account so they follow you across devices. Existing subscribers: sign in once to keep your Haishoku+ active.