back next

The ImageColor Module

The ImageColor module contains colour tables and converters from CSS3-style colour specifiers to RGB tuples. This module is used by Image.new and the ImageDraw module, among others.

Colour Names #

The ImageColor module supports the following string formats:

  • Hexadecimal color specifiers, given as “#rgb” or “#rrggbb”. For example, “#ff0000” specifies pure red.

  • RGB functions, given as “rgb(red, green, blue)” where the colour values are integers in the range 0 to 255. Alternatively, the color values can be given as three percentages (0% to 100%). For example, “rgb(255,0,0)” and “rgb(100%,0%,0%)” both specify pure red.

  • Hue-Saturation-Lightness (HSL) functions, given as “hsl(hue, saturation%, lightness%)” where hue is the colour given as an angle between 0 and 360 (red=0, green=120, blue=240), saturation is a value between 0% and 100% (gray=0%, full color=100%), and lightness is a value between 0% and 100% (black=0%, normal=50%, white=100%). For example, “hsl(0,100%,50%)” is pure red.

  • Common HTML colour names. The ImageColor module provides some 140 standard colour names, based on the colors supported by the X Window system and most web browsers. Colour names are case insensitive. For example, “red” and “Red” both specify pure red.

Functions #

getrgb #

getrgb(color) ⇒ (red, green, blue)

(New in 1.1.4) Convert a colour string to an RGB tuple. If the string cannot be parsed, this function raises a ValueError exception.

getcolor #

getcolor(color, mode) ⇒ (red, green, blue) or integer

(New in 1.1.4) Same as getrgb, but converts the RGB value to a greyscale value if the mode is not color or a palette image. If the string cannot be parsed, this function raises a ValueError exception.

 

A Django site. rendered by a django application. hosted by webfaction.