I am looking for more resources on color theory in cartography. When to de-saturate a color? Or if you start with one color, how do you create a ramp from it? RGB or HSV? I can hack at it and come up with something, but I'm wondering if there's a methodology to it.
I say this because my work requires I constantly come up with new color ramps, and we are limited in certain colors that we cannot use because of said colors' associations (red is only used for hotspots, green is for positive topics only, etc). I constantly riff off of Color Brewer ramps, defaults, and make my own. I'm wondering if there are additional resources available to help me as a cartographer who primarily does thematic population maps, to come up with new ramps. I know there is a lot of information out there for designers, but I am looking for information more specific to cartography.