Custom default colors

[tupui]

Excellent, thanks, @tupui! This way is even better. Can we set the default colors as these?
{'#DC267F'; '#E8EA2F'; '#26DCD1';'#C552E4';'#3F45D0'}
(first should go to the low-low-low scenario)

Originally posted by @gnopik in #10 (comment)

[tupui]

SEQUENTIAL_PALETTES could either be a list of str or mpl.colors.LinearSegmentedColormap (using colormap_from_single_color). Then we just need to update the cmaps logic in palette to take that into account.

[gnopik]

@tupui, for decomposition with 3 variables the default colors are too close to each other (screenshot 1).
When repainted, looks fine (screenshot 2). Can we have the second color palette blue-ish as in the case of two variables for decomposition (screenshot 3)?

Checked on different datasets, the same.

[tupui]

Yeah I've seen that. I need to understand what is happening because I would expect "Oranges" and then "Purples". Not "Reds".

[tupui]

All fixed with 9d11699 and a50c803