I have sublime 2/3 and the colorize inside a :javascript block doesn\'t work fine.
The package is this https://sublime.wbond.net/packages/Haml
Actually they says
https://sublime.wbond.net/packages/Haml (https://github.com/phuibonhoa/handcrafted-haml-textmate-bundle) (installed with Package Control) works for me.
Though it would be nice to use it as the default somehow...