allow setting the default colormap, rename colormaps #966

Job	Run time
Linting (Ruff)	1m 1s
Test readme renders on PyPi	16s
Tests on 3.8 (Minimum Versions)	14m 7s
Test import order (isort)	46s
Tests on 3.8	11m 43s
Tests on 3.9	11m 56s
Tests on 3.10	12m 28s
Tests on 3.11	12m 0s
Tests on 3.12	16m 27s
Test Docs / Build Documentation	3m 38s
	1h 24m 22s

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