Theodor S. Geisel submitted the text to his publisher in 1973 but, supposedly, did not want to illustrate the book himself. No illustrator was found, and the text was not turned into a book. In 1992, Geisel's widow, Audrey, resubmitted the manuscript. But it's not a good book. For one thing, the text is a mediocre meditation on color and mood.
Some days are yellow.
Some are blue. On different days I'm different too. And, Wheeeeeeeeeee I am a busy, buzzy bee. Ditto a blue bird, a green fish, a brown bear, a red horse. There is no plot, no zip, no real rhymes.