The Astonishing Color of After by Emily X.R. Pan [in Shelf Awareness]
*STARRED REVIEW Leigh and best friend Axel "figure out what the other person's feeling" by asking "'What color?’": "carbazole violet" for silence, "burnt orange" for anger, "Prussian blue" for hurt. Their unexpected first kiss sets off a "whole goddamn spectrum" of feelings Leigh doesn't have time...