A review of the current state of the field of the Evolution of Colour Categories, and some lovely renditions of the humble color wheel. What is there to say in the face of color, a visual phenomenon that so often seems to elude linguistic expression? A lot, it turns out, in the right hands, especially when approached by slant, ambush, or asymptote—the following six books make such an approach. What colors do Internet companies prefer for their logos? You might assume that they run the spectrum equally, but you’d be wrong. Why pink?, asks Ophelia Deroy, who then explains why color matters. New research finds that how we feel about a color depends on our relationship with that particular shade.