So I’ve been fooling around a bit with python-colorspacious, and jammed it into MyPaint to do some experiments. Adjusting lightness and colorfulness in realtime with CIECAM02 and various illuminants can be pretty interesting and (hopefully) somewhat useful.
Here’s Blue adjusted via the axes of +lightness and -colorfulness with D65 on the left and A on the right. I suppose it shouldn’t be that surprising that “A” looks quite a bit like a sunset, since illuminant A is pretty close to sunset as far as Kelvin goes (2856K vs 3200K):
and here’s Red adjusted with D75, D55, and A from top to bottom, only adjusting the colorfulness:
I made a couple videos in case it helps
https://www.youtube.com/watch?v=FOwTDlGzyMY
https://www.youtube.com/watch?v=6Sh4Zu0LBpQ