Board Thread:Support Requests - Getting Technical/@comment-25606048-20141123184246/@comment-452-20141123185533

You:
 * 1) Right click on the blue link
 * 2) Choose "Inspect Element" (or equivalent)
 * 3) Locate the style you want to change
 * 4) Copy that style to Mediawiki:Wikia.css
 * 5) Change the "color" value to whatever color you like.

In this case, the applicable style is:

Edit: Oh yeah, or Special:ThemeDesigner