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A HUSL color space conversion library that works with numpy

Project description

HUSL color space conversion

A color space conversion library that works with numpy. See to learn about the HUSL color space.


1. Fast conversion to RGB from HUSL and vice versa. Convert a 1080p image to HUSL in less than a second. 2. Seamless performance improvements with NumExpr, Cython, and OpenMP (whichever’s available). 3. Flexible numpy arrays as inputs and outputs. Plays nicely with OpenCV, MoviePy, etc.


  1. virtualenv env -p python3
  2. source env/bin/activate
  3. pip install numpy
  4. (optional) pip install Cython (or NumExpr, but Cython is preferred)
  5. pip install git+

Basic usage

  • to_rgb(hsl) Convert HUSL array to RGB integer array
  • to_husl(rgb) Convert RGB integer array or grayscale float array to HUSL
  • array
  • to_hue(rgb) Convert RGB integer array or grayscale float array to array of
  • hue values


See for complete documentation.

Project details

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