Edit File: colorsys.txt
:mod:`colorsys` --- Conversions between color systems ===================================================== .. module:: colorsys :synopsis: Conversion functions between RGB and other color systems. .. sectionauthor:: David Ascher <da@python.net> **Source code:** :source:`Lib/colorsys.py` -------------- The :mod:`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. .. seealso:: More information about color spaces can be found at http://www.poynton.com/ColorFAQ.html and http://www.cambridgeincolour.com/tutorials/color-spaces.htm. The :mod:`colorsys` module defines the following functions: .. function:: rgb_to_yiq(r, g, b) Convert the color from RGB coordinates to YIQ coordinates. .. function:: yiq_to_rgb(y, i, q) Convert the color from YIQ coordinates to RGB coordinates. .. function:: rgb_to_hls(r, g, b) Convert the color from RGB coordinates to HLS coordinates. .. function:: hls_to_rgb(h, l, s) Convert the color from HLS coordinates to RGB coordinates. .. function:: rgb_to_hsv(r, g, b) Convert the color from RGB coordinates to HSV coordinates. .. function:: 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)