A canvas based color picker. Demo.
Include the two scripts, lib/colorcanvas.js and lib/colorcanvas.input.js inside your page.
<head>
<script src="lib/colorcanvas.js"></script>
<script src="lib/colorcanvas.input.js"></script>
</head>
Any color inputs will now automatically be shimmed.
<input type="color" value="#FF0000">
You may also want to include the default styles, located in site/styles.css.
You can build ColorCanvas using Ruby's Bundler.
bundle install
rake build
Many thanks to Jeremy Apthorp for advice and bug fixing.