Initially I just had my 100 and 200 set to black background with white text. Partly due to it being easier to see for me, but also out of laziness. I was more concerned with the functionality.
Since I am one of many staying mostly home now with quarantine I started playing with the colors on my units. My 200 sits on a corner table and I have to look at it from farther away most of the time so that one has lighter blues, yellows, greens, and fuschias. The 100 is usually right next to me on the counter next to the couch so that one I have deeper/darker/richer looking blues, reds, and greens.
I'll post pictures when I get off of work.