Colormap diverging from black instead of white?

Question

I would like a diverging colormap that has another colour than white (preferably black) as it center color. Neither matplotlib or cmocean seems to have such a colormap. Is my best option to create an own colormap, or are there existing ones?

Answer 1

@JohanC put an obvious answer in their comment and I didn't see it because of the accepted answer which requires a less-known package:

Seaborn supports arbitrary diverging palettes with black center

hue_neg, hue_pos = 250, 15
cmap = sns.diverging_palette(hue_neg, hue_pos, center="dark", as_cmap=True)