Convert matplotlib color value to RGB-CodePudding

I want to convert color value in this format ((0.19215686274509805, 0.5098039215686274, 0.7411764705882353)) to RGB value.

I tried the following,

    import matplotlib
    from matplotlib import pyplot as plt

    cycler = plt.cycler("color", plt.cm.tab20c.colors)()

    color = next(cycler)['color']
    color_rgb = matplotlib.colors.to_rgb(color) # <--

The last line, to_rgb(color) doesn't work.

Any suggestions?

CodePudding user response：

The problem you describe is that your statement:

The last line, to_rgb(color) doesn't work.

is not true.

As OrOrg already commented:

to_rgb(c) converts whatever c is (can be many things as long as it relates to color: a hex string, name, ...) into an RGB tuple with values in the range [0,1]. But in your case c is already an RGB tuple, so nothing extra happens.

What you expect is to get the RGB values as integers or a string with a hex-code what can be done as follows:

from matplotlib import pyplot as plt

cycler = plt.cycler("color", plt.cm.tab20c.colors)()
color = next(cycler)["color"]

color_rgb = tuple([int(c*255) for c in color])  # <--
print(color_rgb)     # gives (49, 130, 189)
color_rgb_hex = '#xxx' % color_rgb     # <--
print(color_rgb_hex) # gives '#3182bd'

The matplotlib .to_hex() works as by you expected :

color_rgb_hex_by_matplotlib = matplotlib.colors.to_hex(color)
print(color_rgb_hex_by_matplotlib) # gives '#3182bd'

The matplotlib .to_rgb() drops only the alpha channel from the to it passed color see here