Color Difference Challenge
Pick the subtly different shade from a grid of colored blocks, with increasing difficulty.
Play Color Difference Challenge
Click the tile with a different shade across ten levels.
How to play Color Difference Challenge
Click the tile with a different shade across ten levels.
How results are calculated
Number of correct color distinctions and elapsed time.
Accuracy, limitations and fair comparisons
Do not interpret this game as a color vision diagnosis. The challenge runs in your current browser session; compare repeated attempts on the same device for a more useful personal reference.
Questions and answers
Is Color Difference Challenge free?
Yes. This activity is free and does not require registration.
Does this test upload my input or score?
No. Gameplay and optional history storage run in your browser on this device; exporting a result requires your own action.
What is the measured result?
Number of correct color distinctions and elapsed time.
Can the result be treated as a medical or hardware diagnosis?
No. Do not interpret this game as a color vision diagnosis.
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