Tonla

Tonla is a minimal game that tests your color perception and memory.

A color appears on screen for a brief moment. Look closely, keep it in mind — then it disappears. Try to recreate it using the hue, saturation, and brightness sliders. Your guess is scored from 0 to 100 based on how perceptually close it is to the target.

TWO MODES • Daily Challenge: A 5-round series every day. The colors are unique to the day and identical for everyone. Finish the day and grow your streak. • Endless Mode: Unlimited rounds, a fresh color each time. Play as much as you want.

HIGHLIGHTS • Perceptual scoring: Not a naive color difference, but a measure close to human vision (CIEDE2000). • Streak tracking: Keep your run of consecutive days alive. • Statistics: Follow your score trend on a chart and review your recent rounds. • Light and dark themes. • Optional daily reminder.

PRIVACY Tonla requires no account, needs no internet connection, and collects no data. Everything stays on your device.