Simulate color blindness by converting RGB hex codes. This is a node.js port of the daltonize code by mudcu.be. See Links for more information.
Install the module with: npm install color-blind
var blinder = require('color-blind'); blinder.protanopia('#42dead'); // result: "#d1c4a0"
| Group | |||
|---|---|---|---|
| Trichromat 3 good cones |
Normal | ||
| Anomalous Trichromat 2 good cones, 1 bad |
Protanomaly low red |
Deuteranomaly low green |
Tritanomaly low blue |
| Dichromat 2 good cones, 1 blind |
Protanopia no red |
Deuteranopia no green |
Tritanopia no blue |
| Monochromat 1 good cone, 2 blind/bad |
Achromatomaly almost no color |
Achromatopsia no color |
All the exported functions accept 2 parameters:
- colorString - any valid CSS color string
- returnRgb optional
- if true, then an object containing RGB values is returned
- if false or not passed, then a hex string is returned
Part of the "Anomalous Trichromat" family of color blindness. The viewer sees low amounts of red.
Examples:
blinder.protanomaly("#42dead"); // result: "#9dcea5" blinder.protanomaly("#42dead", false); // result: "#9dcea5" blinder.protanomaly("#42dead", true); // result: {"R":156.81027381701807,"G":205.52274401697787,"B":164.8656701007824}
Part of the "Dichromat" family of color blindness. The viewer sees no red.
Examples:
blinder.protanopia("#42dead"); // result: "#d1c4a0" blinder.protanopia("#42dead", false); // result: "#d1c4a0" blinder.protanopia("#42dead", true); // result: {"R":208.70185885531413,"G":196.10716916953663,"B":160.21748158694382}
Part of the "Anomalous Trichromat" family of color blindness. The viewer sees low amounts of green.
Examples:
blinder.deuteranomaly("#42dead"); // result: "#a5c9b3" blinder.deuteranomaly("#42dead", false); // result: "#a5c9b3" blinder.deuteranomaly("#42dead", true); // result: {"R":165.29136650372695,"G":201.41446893677266,"B":178.9125102904318}
Part of the "Dichromat" family of color blindness. The viewer sees no green.
Examples:
blinder.deuteranopia("#42dead"); // result: "#debeb6" blinder.deuteranopia("#42dead", false); // result: "#debeb6" blinder.deuteranopia("#42dead", true); // result: {"R":222.02929022014237,"G":189.6513083292142,"B":182.29108759925}
Part of the "Anomalous Trichromat" family of color blindness. The viewer sees low amounts of blue.
Examples:
blinder.tritanomaly("#42dead"); // result: "#56d8d1" blinder.tritanomaly("#42dead", false); // result: "#56d8d1" blinder.tritanomaly("#42dead", true); // result: {"R":86.14054005420464,"G":216.21898840123637,"B":209.23279525212993}
Part of the "Dichromat" family of color blindness. The viewer sees no blue.
Examples:
blinder.tritanopia("#42dead"); // result: "#62d5e6" blinder.tritanopia("#42dead", false); // result: "#62d5e6" blinder.tritanopia("#42dead", true); // result: {"R":97.64942008517872,"G":212.91555320194286,"B":229.93724968191844}
Part of the "Monochromat" family of color blindness. The viewer sees the absence of most color.
Examples:
blinder.achromatomaly("#42dead"); // result: "#8ec7b5" blinder.achromatomaly("#42dead", false); // result: "#8ec7b5" blinder.achromatomaly("#42dead", true); // result: {"R":141.91089545454545,"G":198.63816818181814,"B":180.81998636363636}
Part of the "Monochromat" family of color blindness. The viewer sees no color at all.
Examples:
blinder.achromatopsia("#42dead"); // result: "#b9b9b9" blinder.achromatopsia("#42dead", false); // result: "#b9b9b9" blinder.achromatopsia("#42dead", true); // result: {"R":185.28855,"G":185.28855,"B":185.28855}
- initial release
Originally this project was licensed with:
Copyright (c) 2014 skratchdot
Licensed under the MIT license.
But the main algorithm is from code that included:
The Color Blindness Simulation function is
copyright (c) 2000-2001 by Matthew Wickline and the
Human-Computer Interaction Resource Network ( http://hcirn.com/ ).
It is used with the permission of Matthew Wickline and HCIRN,
and is freely available for non-commercial use. For commercial use, please
contact the Human-Computer Interaction Resource Network ( http://hcirn.com/ ).
I've included a note about HCIRN that was copied/edited from http://colorlab.wickline.org/colorblind/colorlab/engine.js:
HCIRN appears to no longer exist. This makes it impractical
for users to obtain permission from HCIRN in order to use
this file for commercial works. Instead:
This work is licensed under a
Creative Commons Attribution-ShareAlike 4.0 International License.
http://creativecommons.org/licenses/by-sa/4.0/
On 10/13/2022 the license needed to be updated to include CC-BY-SA-4.0.
For more information about this change, please see: #3
Sorry for any issues this has caused.