I'm not sure if this is the right place for this, but since i'm new here i'll post it here until someone tells me it should go somewhere else. Anyway, I am currently wondering how to measure the color of some post it notes. It started as a friendly argument as to which post it pad was more red, a hot pink, or a pinkish salmon color. After causing a riot in the AP art class at my high school, we could not determine which was more red. I've tried an online histogram of the post it notes, the problem is that it is giving me the same graph for both sticky note pads. Does anyone have an idea on how to scientifically determine which pad is more red?