Originally Posted by
SpiderLily_x
They have tests of pictures made out of colors that are different in hue, but the same in tone.
For example, it might be a collection of dots or shapes, and in the middle is a ketter or number made of shapes of a different color. If you're colorblind, it looks like a bunch of gray shapes (or dots that are all the same color, depending on what branch of colorblindness you have/are being tested for). These can be found lots of places. Though there are many different versions testing for varying sight capabilities.