Open a room
How many colors?
The app
Two players, each on their own phone or computer. One hides a color. The other guesses. A miss is a point for the picker. A hit swaps who hides. The match ends when each of you has read the other ten times, or when either of you ends it.
How many colors?
Sit with anyone who is waiting. Their color count becomes yours. Or use a code they sent you.
No one is waiting right now.