If you're using “Jade” language for your templates, you may want to consider using the :prismjs filter from jstransformers so that you can style your code snippets.

However, after installing it myself I had some trouble finding help on how to define the language, but eventually stumbled across it with a simple attribute:

:prismjs( language="css" ) 

    .my-class { color: red; }

It seems super simple, and it is... but it's really not documented anywhere, and caused me some headache.