Explanation of Colour options and corresponding default.css entries

I'm making color changes to the default.css preset option via the Colour options. I'm having a hard time understanding what entries in the css correspond to each of the color option fields. For example:

Link current colour - where is this in the default.css file? (I see references for link, visited and hover in the css file , but not "current")

Text colour - what entry is this in the css?

It's hard for me to tell what each entry in the Colour Options relates to in a css file so I was hoping you have a reference doc I could use for this purpose.

Thanks for any help!