21.7. colorsys — Conversions between color systems¶
Source code: Lib/colorsys.py
The colorsys module defines bidirectional conversions of color values
between colors expressed in the RGB (Red Green Blue) color space used in
computer monitors and three other coordinate systems: YIQ, HLS (Hue Lightness
Saturation) and HSV (Hue Saturation Value). Coordinates in all of these color
spaces are floating point values. In the YIQ space, the Y coordinate is between
0 and 1, but the I and Q coordinates can be positive or negative. In all other
spaces, the coordinates are all between 0 and 1.
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More information about color spaces can be found at https://www.poynton.com/ColorFAQ.html and https://www.cambridgeincolour.com/tutorials/color-spaces.htm.
The colorsys module defines the following functions:
-
colorsys.rgb_to_yiq(r, g, b)¶ Convert the color from RGB coordinates to YIQ coordinates.
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colorsys.yiq_to_rgb(y, i, q)¶ Convert the color from YIQ coordinates to RGB coordinates.
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colorsys.rgb_to_hls(r, g, b)¶ Convert the color from RGB coordinates to HLS coordinates.
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colorsys.hls_to_rgb(h, l, s)¶ Convert the color from HLS coordinates to RGB coordinates.
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colorsys.rgb_to_hsv(r, g, b)¶ Convert the color from RGB coordinates to HSV coordinates.
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colorsys.hsv_to_rgb(h, s, v)¶ Convert the color from HSV coordinates to RGB coordinates.
Example:
>>> import colorsys
>>> colorsys.rgb_to_hsv(0.2, 0.4, 0.4)
(0.5, 0.5, 0.4)
>>> colorsys.hsv_to_rgb(0.5, 0.5, 0.4)
(0.2, 0.4, 0.4)