Subset of colormap Matplotlib in RGB to html

Question

I am interested in using the cmap('hot') from Matplotlib as a Bokeh palette.

First, I choose the Matplotlib colormap subset given by

from Matplotlib.pyplot as plt
colors_mpl = [i for i in plt.get_cmap('hot')(np.linspace(0.05, 0.95, 6))]

Initially, given an set of RGB colors, I could convert to html by using the built-in function to_hex.

from matplotlib.colors import to_hex
colors_html = [to_hex(rgb/255) for rgb in colors_mpl]]

However, the output I get is not the expected as I get very small differences between colors:

['#000000', '#010000', '#010000', '#010100', '#010100', '#010101']

The expected output is

['#2a0000', '#a30000', '#ff1d00', '#ff9800', '#ffff1b', '#ffffd0']

Any ideas of how to convert the colormap to html properly?

Answer 1

Don't divide by 255, colors_mplt are already in scale 0-1:

colors_html = [to_hex(rgb) for rgb in colors_mpl]
# out
# ['#2a0000', '#a30000', '#ff1d00', '#ff9800', '#ffff1b', '#ffffd0']