I typically work in the limited color pallet because I have a poor sense of color theory. A while back I padded out a short montage comic with a few pages of pinups like this one. While the padding was the point what I also did with it was establish the canonical colors of some of my characters.
I remember being surprised by black and white comics, Stan Sakai's Usagi Yojimbo, when a character that I had only seen in the pages of the book would appear on the cover because it seemed like I always assumed the colors of the characters incorrectly. Blue costumes really being red, brown hair really being blond, and brown bears really being polar bears. With the Saturday Tales characters being any color I felt like I should provide opportunities to see characters in their canonical colors.