There are many things in life I don't understand and lack of color is one of them. Having worked in real estate at one time and having to write about that subject still, I've been exposed many a time to the concept of builder-beige and why it's used. Okay, maybe living in a rainbow-colored house is not that feasible, but what's wrong with a touch of blue, or yellow, or purple, or ...
Anyway, that's one of the reasons I enjoy coloring so much because you can use unlimited colors. One of my favorite combos are rainbow colors. Oh, there are still snobs out there who say you should stick with a limited color palette, but that's not me. Below are some examples of pictures that I colored in rainbow patterns.
From Summer Nights by Hanna Karlzon
From Equinox by Stephen Barnwell
From Colorama Cats and Kittens