This wonderful classic by Bill Martin Jr. and Eric Carle not only reviews colors, it reviews animals as well. They have written two sequels, "Polar Bear, Polar Bear, What Do You Hear?" and "Panda Bear, Panda Bear, What Do You See?" that also review colors and animals. Carle's illustrations are deeply but simply colored, allowing preschoolers to focus on each page's dominant color. The books are very repetitive, so young children will remain engaged as they help you "read" the story.
Tana Hoban has created many wonderful concept books for children. In this one, she uses vivid photographs that focus on a few colors. A young boy holds a giant yellow leaf in one photograph and another focuses on a large watermelon with a piece cut out. There are no words, so parents can create words that will match their children's interests and abilities. Preschoolers can move from being told which colors are on the pages ("Look at the big yellow leaf!") to finding specific colors on the pages to "reading" the book to parents.
This series of books by Margery Brown and Howard Simpson features a group of children with skin tones and hair styles that reflect the world more accurately than many children's books. In this book, they become artists and learn about mixing colors.
Ed Emberley's cut-outs and vivid colors help kids deconstruct a monster and find out that he's not so scary after all. Along the way, the book reviews colors while discussing the monster's blue nose and white teeth. Preschool-aged students will enjoy the simple and predictable text.
In this Leo Lionni story, two friends (little Blue and little Yellow) go on adventures together. Preschoolers will review blue and yellow many times while listening to this story. Near the end, the friends nearly lose each other and hug when they reunite. During their hug, they turn green, which is a great introduction into how colors are made. Everything works out in the end, though, so preschoolers will not have to be worried about little Blue and little Yellow.