A nice Color Scheme for "SyntaxHighlighter Evolved" based on "Spacegray", the lovely Theme for Sublime Text 2/3.
It lacks a lot of tags, values and selectors. This is not my theme. The problem is the "SyntaxHighlighter Evolved" plugin for which many tags are still missing. I left messages on the forum plugin, I wait for answers :)
Of course you can but it's a bit dangerous and complicated. You have to add the tags in the "SyntaxHighlighter Evolved" core plugin and if the author release an update, you'll loose your tags. I'll soon write a tutorial in my own blog if you still want to add tags. I'll make a new release of my plugin to notify you.