Color

Color spaces and conversions between them

Version on this page:	0.1.4
LTS Haskell 23.19:	0.3.3
Stackage Nightly 2025-04-30:	0.4.0
Latest on Hackage:	0.4.0

See all snapshots Color appears in

BSD-3-Clause licensed by Alexey Kuleshevich

Maintained by [email protected]

This version can be pinned in stack with:Color-0.1.4@sha256:bd63ebe43000228a0ce087f2aee91b99d3c5d2a0c8506551ce37dad8eb5e44e8,8070

Module documentation for 0.1.4

Graphics
- Graphics.Color
  - Graphics.Color.Adaptation
    - Graphics.Color.Adaptation.VonKries
  - Graphics.Color.Algebra
    - Graphics.Color.Algebra.Binary
  - Graphics.Color.Illuminant
    - Graphics.Color.Illuminant.CIE1931
    - Graphics.Color.Illuminant.CIE1964
    - Graphics.Color.Illuminant.ICC
      - Graphics.Color.Illuminant.ICC.PCS
    - Graphics.Color.Illuminant.ITU
      - Graphics.Color.Illuminant.ITU.Rec470
      - Graphics.Color.Illuminant.ITU.Rec601
    - Graphics.Color.Illuminant.Wikipedia
  - Graphics.Color.Model
  - Graphics.Color.Space
    - Graphics.Color.Space.CIE1931
      - Graphics.Color.Space.CIE1931.XYZ
    - Graphics.Color.Space.CIE1976
      - Graphics.Color.Space.CIE1976.LAB
    - Graphics.Color.Space.RGB
  - Graphics.Color.Standard
    - Graphics.Color.Standard.RAL
- Graphics.Pixel
  - Graphics.Pixel.ColorSpace

Depends on 4 packages(full list with versions):

base, data-default-class, deepseq, vector

Used by 1 package in lts-15.3(full list with versions):

massiv-io

Color

Language	Travis	Coveralls	Gitter.im

Package	Hackage	Nightly	LTS
`Color`

A library for dealing with Colors and pixels. It implements arbitrary color space conversion, chromatic adaptation and other color manipulations.

There is a clear separation between color models, color spaces and alternative representations of color spaces. All are distinct at the type level. The goal is to prevent mixups of incompatible color types as well as utilize type information for conversion between them.

Currently supported:

Color models:
- Y
- RGB
- HSI
- HSL
- HSV
- YCbCr
- CMYK
Color spaces and arbitrary conversions between them:
- Y - luminance
- CIE XYZ
- CIE L*a*b*
- RGB:
  - sRGB
  - AdobeRGB
  - ITU: Rec470, Rec601 and Rec709
  - Alternative representations:
    - HSI
    - HSL
    - HSV
    - YCbCr
    - CMYK
Illuminants:
- CIE1931 - 2 degree observer
- CIE1964 - 10 degree observer
- Some common alternatives
Chromatic adaptation:
- VonKries adaptation with transformations:
  - VonKries
  - Bradford (default)
  - Fairchild
  - CIECAM02
Color Standards:
- RAL

External resources

Color is on a list of curated Awesome Colour resources.
While working on this library the colour-science.org and their Python implementation of colour was used extensively as a reference.

Changes

Changelog for color

0.1.4

Export pixelColor
Add luma related patterns: PixelY', PixelY'A, Y' and Y'A. Also rgbPixelLuma

0.1.3.1

Fix introduced in 0.1.2 for Alpha cs was incomplete and is fixed in this version without breakage.

0.1.3 (deprecated)

Addition of CMCCAT2000.
Rename CIECAM02 to CIECAT02 with a fallback synonym for backwards compatibility
Fix ColorSpace instance for Alpha cs
Add ColorSpace instances for YCbCr cs color spaces that have Luma instance: BT709, BT601_525 and BT601_625

0.1.2

Fix YCbCr conversion to derived RGB color spaces
Fix conversion of toWord64 (1 :: Double) and toWord632 (1 :: Float).
Addition of xyzColorMatchingFunctions and spectralPowerDistributions

0.1.1

Addition of Graphics.Color.Illuminant.Wikipedia module
Addition of convertColor and convertColorFloat functions

0.1.0

Initial alpha release