Three levels plus Turbo
Very Easy sets two of the three sliders for you, Easy sets one, Normal leaves all three to you. In Go Turbo the target color shows for a moment and then disappears, so you rebuild it from memory.
A quick color matching game for iPhone and iPad. Rebuild the target color with three sliders for red, green and blue in 30 seconds, and get scored on how different the two look to the human eye - your history stays on your device.
Coming to the App StoreMove the sliders until your color matches the target, then send it. No timer and no score here, the app has both.
Very Easy sets two of the three sliders for you, Easy sets one, Normal leaves all three to you. In Go Turbo the target color shows for a moment and then disappears, so you rebuild it from memory.
The score follows how different the two colors look to the eye (CIELAB distance), not how close the raw RGB numbers are. Easier levels cap the score: Very Easy 80, Easy 90, Normal 100.
Daily and all-time leaderboards plus 13 badges to collect, from trying each level to spotting the exact hue. It is optional, the game plays the same without it.
30 seconds
A round lasts 30 seconds. When the time is up, your current guess is sent automatically, so a round fits into a coffee break.
Eyes and memory
Comparing colors and holding one in mind while you move three sliders puts visual perception, attention and short-term visual memory to work. The Brain section in the app explains how and links the studies.
One tap away
English, German, French, Dutch, Italian and Turkish - the app follows your device's language automatically, or you can choose it yourself. There is Klingon (tlhIngan Hol) too: pick TLH in the language menu.
Nothing is hidden. The scoring and the difficulty caps are written out in the rules screen inside the app.
Full details in the privacy policy.