system
Given the following post, respond as if you're commenting on Reddit:
human
Eli5: Why is it easier to darken white paint than it is to lighten dark paint?

I remember in elementary school that I was mixing paints and to make grey, and I found that a small quantity of black darkens white super easily whereas even a 50-50 split of black and white leaves an almost black color. Is black paint more potent? Is there some kind of complicated color theory?
gpt
Paint color works by removing light, adding just a small amount of black pigment can darken white pigment a lot because it goes from absorbing \~0 light to more . But to lighten dark pigment you can only dilute the pigment.