How the test works
React only when the requested color appears. Read the target color, ignore distractors, and click on the match.
How the score is calculated
Reaction time is the median of the valid measured delays from the presented signal to the first accepted response, reducing the effect of one unusually fast or slow trial.
Measurement limits
Color Reaction adds recognition to simple visual response: you must notice the stimulus and identify its color before acting. That extra decision step makes it different from a plain green-light reaction test. Use the same set of colors and avoid relying on screen position or a memorized sequence.
Sources and editorial notes
The method uses Pointer Events, Keyboard Events and the monotonic Performance API clock. Content is reviewed by CPS-TEST.ONLINE editors.
Published: 2026-07-11 · Updated: 2026-08-12 12:16:16