Bilingual children's book - English and Spanish. This is the story of a psychedelic clown dressed up in bright neon colors tubes, who lives in a small seaside town, where its inhabitants suffer from achromatopsia. They don’t see the entire spectrum of existing colors. Billy Jester will have to face his frustration and sadness with his friend Ander, a newly arrived child in Grayland, to make its inhabitants understand that there are more colors than white, black and gray. Esta es la historia de un payaso psicodélico ataviado de brillantes tubos de colores de neón, que vive en un pequeño pueblo costero, donde sus habitantes sufren de acromatopsia. No ven todo el espectro de colores existentes. Billy Jester tendrá que enfrentarse a su frustración y tristeza junto a su amigo Ander, un niño recién llegado a Grislandia, para hacer comprender a sus habitantes de que existen más colores aparte del blanco, negro y gris.