My daughter bought me a children's book while on vacation in Oregon. She went to Powell's Books, one of the largest bookstores in the US and found this remarkable book for me.
It is called "Il Mago dei Colori", the "Magician of the Colors."
It is about a magician who turns his black/white/grey world into first a blue world (but everyone was too sad); then a yellow world (too bright for everyone); then a red/magenta world (too much emotion). When he finally mixes up all the colors, and everything becomes a kaleidoscope of color, all becomes fine in his world.
In English the book is titled "The Great Blueness" which certainly doesn't have the same charm. Although translated, the final line in the book is,
"At last, the world was too beautiful ever to be changed again."