Which one of the boxes has an irregular color?

A screenshot of the iGame color vision test.
I’m very color blind by traditional tests, but my score in this one has improved over time. Am I learning the test, or…?
Which one of the boxes has an irregular color?
A screenshot of the iGame color vision test.
I’m very color blind by traditional tests, but my score in this one has improved over time. Am I learning the test, or…?