Colorful.js is a javascript framework to simplify work with colors in the browser
Use the latest version:
Add this to your html:
<script type="text/javascript" src="https://greencoder001.github.io/colorful.js/dist/bundle.js"></script>
or
Use the latest version using jsdelivr:
Add this to your html:
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/greencoder001/colorful.js@latest/dist/bundle.js"></script>
or
Use a specific version:
Download the latest release, unpack it and add this html:
<script type="text/javascript" src="/your/path/to/dist/bundle.js"></script>