Color modeling and conversion framework in Swift


Build and Test


CoreColor is a color modeling and conversion framework written in Swift. It is designed for a wide range of audience, including color enthusiasts, engineers, visual designers and artists, as well as those involved in scientific researches that rely on color modeling.

CoreColor provides the modeling for a variety of common color models and associated color spaces, including common ones such as RGB, CMYK, HSL, HSV, LAB, and XYZ, as well as facilities for converting between a particular color model to any of the other ones.


The interfaces of CoreColor are simple and intuitive to use. Here’s an example of creating an instance of RGB color model in sRGB color space, and convert it to the equivalent CMYK model.

import CoreColor

let rgb = RGB(r: 0.40, g: 0.50, b: 0.60, alpha: 1.0, space: RGBColorSpaces.sRGB)
print(rgb) // RGB(r: 0.4, g: 0.5, b: 0.6, alpha: 1.0, space: CoreColor.RGBColorSpace(...))

let cmyk = rgb.toCMYK()
print(cmyk) // CMYK(c: 0.3333334, m: 0.1666667, y: 0.0, k: 0.39999998, alpha: 1.0)


Color Models

The following color models are currently supported in this version:

  • RGB (various RGB color spaces)
  • LUV (CIE 1976 L*u*v*)
  • LAB (CIE 1976 L*a*b*)
  • CMYK
  • HSV
  • HSL

RGB Color Space

The following variations of RGB color spaces are currently supported in this version:

  • sRGB
  • Linear sRGB
  • Adobe RGB
  • Display P3


CoreColor is licensed under the MIT License.


CoreColor is a project of @yukonblue.


View Github