Creating a color scheme for your "comic strip" is like nailing yourself to the floor and wondering why you can't run.
When I created this color key, I knew what the colors on Nathan (yellow hair, third from left) and Farmer Butt (the farmer on the far right) would be. Those were easy. The cat in the box, Gooseberry, is always in a tan box, shyly hiding from view.
Abbott, on the other hand, has somehow gone blue, green, purple and a host of other colors:
Never just "tan" with red shoes.
I suppose there are advantages to locking in characters, but I'd really just rather put them in different ones and let the thing breathe a bit.
Since I don't work conventionally, why fall into conventions that are outdated anyway? I am not working at a very high level--this is amateurish fun. But I don't see why I should worry about a slick, professional look when something rougher is a lot more interesting to me to draw.