A custom color reaction time test lets you set the colours that mean wait and go. It is handy for colour-blind players and for testing how colour changes your speed. The colour match mode adds a choice, so you react only when the target appears.
Why choose your own colours
Red to green is hard to see for many people with colour vision deficiency. Picking blue and yellow, or black and white, gives them a fair test. Designers and teachers also use custom colours to show that bright, high-contrast changes are spotted faster.
Change the colours before you start, and keep them the same for every session you want to compare.
Colour match: a choice reaction time test
In colour match mode the screen flashes several decoy colours before your target. You must hold back on every decoy and tap only on the target. Tapping a decoy restarts the round.
This turns a simple test into a choice test. Your brain now has to sort the signal before it acts, and that costs time. Most people are 100 ms or more slower here, which shows how decisions slow reactions in driving, sport and games.
How it works
- 01
Pick a mode and colours
Set wait and go colours, or choose a target colour for match mode.
- 02
React to the right colour
Tap only when your go or target colour fills the box. Decoys reset the round.
- 03
Compare five rounds
See your average, then try the other mode to measure your choice delay.
Who uses this test
- Colour-blind gamers setting blue and yellow instead of red and green
- Psychology students showing simple versus choice reaction time
- UI designers testing which alert colour people notice first
- Parents making a calm colour game for children
- Esports players training to ignore fake-out flashes
- Comparing reaction speed in bright versus dim colour pairs
Frequently asked questions
Why does colour match mode feel slower?
You are making a decision before you tap. Sorting the target from decoys adds processing time in the brain. A gap of about 100 to 150 ms over the simple mode is common.
Which colours give the fastest reaction time?
Big changes in brightness are easiest to spot, such as black to white or dark blue to yellow. Changes between similar colours are slower. Try a few pairs and compare your averages.
Is this test good for colour-blind people?
Yes. You can avoid red and green entirely and pick any pair you see clearly. The scoring works the same for every colour choice.
What is choice reaction time?
Choice reaction time is the time to respond when more than one signal is possible and only some need an answer. It is always longer than simple reaction time. Colour match mode measures it.
Do decoy colours count as mistakes?
Tapping a decoy restarts that round, but no penalty is added to your score. Your aim is to stay patient and still be quick on the true target.
Can teachers use this in class?
Yes. Run the simple mode, then colour match, and have students record both averages. The gap is a clear, hands-on example of decision time.
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