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What is colorsys.rgb_to_hls(r, g, b) in Python?

Syed Muhammad Ali Mustafa

The colorsys.rgb_to_hls(r, g, b) function converts RGBRed Green Blue coordinates to HLSHue Lightness Saturation coordinates. The hls color scale is a re-coding of the rgb color scale. We generally use this to indite variants of a color by simply increasing or decreasing the Hue, Lightness, or Saturation of the color.

Declaration

The colorsys module stores the definition of the rgb_to_hls() function. We can import the colorsys module using the following code:

import colorsys

colorsys.rgb_to_hls(r, g, b)

r, g, and b can have any value between 0 and 1 inclusive.

Code

The following code snippet demonstrates the use of rgb_to_hls():

import colorsys

if __name__ == '__main__':
  r = 132
  g = 24
  b = 100

  ## normalizing values to get value between 0 and 1
  r = r/255
  g = g/255
  b = b/255

  h, l, s = colorsys.rgb_to_hls(r, g, b)

  print('RGB:-')
  print('r: ' + str(r) + '\ng: ' + str(g) + '\nb: ' + str(b))
  print('\nHLS:-')
  print('h: ' + str(h) + '\nl: ' + str(l) + '\ns: ' + str(s))

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