First I read Cat's Colors by Jane Cabrera. A sweet story with bright, interesting illustrations. The kids loved to guess which color was Cat's favorite.
White Rabbit's Color Book by Alan Baker is a good introduction to primary colors and the mixing of secondary colors. The activity I did with this book was a color mixing experiment. The children had to guess what colors mixed together make a different color. I used food color of the three primary colors and mixed them in front of the children. It was like a magic trick. Very fun.
The last story incorporated colors and counting. Dog's Colorful Day: A Messy Story About Colors and Counting by Emma Dodd had the kids participating and laughing. Dog seems to be underfoot when colorful is spilt, or splashed or patted on him. He ends up with ten color spots on his white coat to count before book's end and Dog's bath.
Diana