If you've seen one Cat, you've seen 'em all. And this Cat is just like the one we saw in The Cat in the Hat. In terms of color, it's pretty basic stuff. In addition to black and white, we've just got red, pink, and several shades of blue. In the 1950s, red = Communism; and red, white, and blue = American. You do the math. (Seriously, do the math. We still haven't quite figured it out—check out "Meaning" for more on that.)
Add that to the super-expressive faces of the cats and kids alike, and you've got yourself a true taste of Seussy illustrations.