Little red hearts symbolize love. Heart symbols are red because real hearts are red. I don’t know what color the inside of a Grumble is, though, and I don’t intend to ever find out. Never going to be any gore in this comic. I suppose the color of the inside of someone’s mouth is a good indication, though. That varies from person to person.

Anyway, Blue is in love with Green, and everyone knows this but him. This has gone on for quite a while now. Yellow, being slightly villainous, and no friend of Green’s, is not really the best person to reveal her secrets to.