There are several good themes on the Internet for prettify, like this gallery on github: http://jmblog.github.com/color-themes-for-google-code-prettify/
On that gallery page, it says "download the css, rename to prettify.css and overwrite the original one shipped with prettify.js". However, there is no prettify.css in WP-Markdown. How should I apply a code coloring theme to the prettify.js embedded in WP-Markdown?
Also, the WordPress.stackexchange question here: