The main character loves to paint, but she can’t decide what color she should use to paint a kiss.  As she ponders each choice, she considers things she does and does not like that are that color, along with other things associated with that color (like red being the color of anger and blue the color of sadness).  In the end, she just can’t decide, so she asks her mom. The book ends with an illustration showing mom giving her a kiss, and the background filled with hearts of all colors.