I came across this game a while ago, I liked it but it wasn’t challenging enough, so I made my own version of it.

Normal Mode:
60 seconds time limit in total, no attempt limit.

Normal mode score reference:
0-20: Maybe something wrong with your screen or monitor?
20-50: This is a normal score.
50+: You should try Challenge mode.

Challenge Mode:
No total time limit. But for each round, you need to find the correct one within 10 seconds and 3 attempts, these reset every round, so you can keep going until you fail.

Challenge score reference:
0-50: You might need some warm up on normal mode first.
50-100: Not bad. Maybe try again to see if you can do better.
100-150: Great. You did really well.
150+: Excellent. You got perfect eyes.
200: This is the max difficulty. Click here if you want to experiment this difficulty.

Please be aware that your screen may affect your performance.

Tetrachromacy

You may have never heard of the term tetrachromacy. Because most humans are trichromatic. Trichromacy means having three types of cone cells to perceive colour from light. Whereas, tetrachromacy has four types of cone cells.

Some people are tetrachromatic, and they are extremely rare. Tetrachromats are able to see more colour than trichromats. Concetta Antico is one of the people known as tetrachromat artists. Check out her art works on her website: https://concettaantico.com/

The game above won’t be able to test tetrachromacy since our technology is only developed for RGB trichromacy.