Interesting blog post by Ray Mazza: Designing Character Traits in The Sims 3

@SuzyCue72 Yes, I meant tetrachromats. Regarding the slide show, none of those apply. I actually have protanomaly (see here for explanations), where you still have three cones, but the absorption maximum of the red one is shifted toward lower wavelengths, very close to the green one. The commonly used definitions simplify the field.

I don't think they would have modeled that in the game. Even the most common "color blindness", deuteranomaly (6% of males), is usually not considered.