New mode is called browser-css.
Add browser-css mode
Add browser-css test
Do you have the .css file you are using? Seems like it would be useful to check that into the repo as well.
Where do you want that file? Main directory? How shall I name it?
I'll just include it in the example.html and name it example.css.
Clean up test
Add browser-css to example.html
(@Marak It's included... you can hit merge)
A fix for this issue has been incorporated into https://npmjs.org/package/colour