Greetings,
i just came across this site:
http://tmtheme-editor.herokuapp.com/#/PlasticCodeWrap
and here is the documentation/reference:
http://manual.macromates.com/en/language_grammars (scroll to the bottom)
TextMate and Sublime Text is equal in many cases, and this is one of them.
Lets say we want to create 2 different colors for comments, blue for a block comment(multiline comment) and green for sinlge line comments. You would do it like so:
Click the +(add) and give a name - you can name it anything you'd like. Now select some colors for background and foreground and you can also select if you want it to be bold/underlined/italic. In this case we select blue(foreground) because its for our block comment. Now in the scope name write: comment.block and add it. Now for our comment line, we will once again click add, this time we select green in our foreground color. In our scope name we write: comment.line and add it. (Dependent on which language you use you can also tell that only if the comment is a double-dash comment the highlight occours. So instead of writing comment.line, we write: comment.line.double-dash) also just by writing comment with no subcategory everything of the type comment will be highlighted.
you can specify it in other ways, but using a . between each subcategory is a nice and clean way to see which the highlighting belongs to.
So if you had some things in mind for my project like: This color highlighting would be cool, link me a page and i will take a look