For this class I created four different color palettes and I applied them to the same illustration os that I could compare them all and see which one I liked best:

After seeing them together, I chose Autumn. So I tested it in the same illustration 4 different times to make sure all the colors worked, and I changed the ones that didn't.

And now I have a 30 color palette that makes me very happy and that I can start applying to my illustrations to make them look cohesive.