Unread Thread Link Markup

[bl4ze]

I have searched and searched for a thread containing my answer, and to no avail.

With the color scheme I have on my website, simply using a bold or strong tag on the links to denote a thread containing an unread post is barely noticeable.

How can I make it so that the link for a thread containing an unread post is bold and the same color as my theme; but the link for a thread containing no unread posts is not bold and is a shade or two darker than my theme color. (I have multiple different theme colors my users can switch between, and I understand that I'll have to modify each one.)

If anyone could direct me to the css or stylevar that relates to the bolding of the thread link, I would greatly appreciate it.