Grayscale favicon is tool that convert colorfull favicon to grayscale.

Code was taken from Ruby Environment Favicon and adopted for npm, yarn, bower.

Example of usage, normal and grayscaled icon with library:

Several installation options are available:

• install with npm: npm install grayscale-favicon@1.0.0
• install with yarn: yarn add grayscale-favicon@1.0.0
• install with bower: bower install grayscale-favicon@1.0.0

If you use node.js builder:

import GrayscaleFavicon from 'grayscale-favicon';
// var GrayscaleFavicon = require('grayscale-favicon');

GrayscaleFavicon();

If you use bower or just want to load file from source in html:

<script src="/path/to/grayscale-favicon.js" type="text/javascript"></script>
<script>
  window.GrayscaleFavicon.icon();
</script>

The gem is available as open source under the terms of the MIT License.