I knew I wanted a strong purple, so I started there. I also get a pretty good green and orange, which works since I'm painting a goblin and some copper. That leaves me with no strongly saturated primaries at all.
So this is a phone pic and already you can't see the high saturation purple except on the paper towel. Great. :P but hopefully you sort of get the idea. So far the most obvious thing is the desaturated yellow. I don't know if I'm 100% doing it right but it's making me make different color choices. I feel like I'm learning and I'm definitely having fun.