Font Color 2 is for BBCode but also changes moderator username colors and possibly ads too.
Link Color: Default color of all unvisited links.
Visited Link Color: Color for all links that have been visited.
Active Link Color: When clicking a link, it switches color. Not used in some styles.
Hover Link Color: When moving the mouse pointer over a link it changes to this color.
I don't think you can change the outline colors, only cell colors and background colors. If the outline color of the icons is putting you off try changing the cell-background-color to one which better blends.
http://support.forumwise.com/support-thread3288.html
Here are some links for color codes:
http://html-color-codes.com/
http://www.devguru.com/Technologies/html/quickref/color_chart.html
http://www.w3schools.com/html/html_colornames.asp
http://www.pitt.edu/~nisg/cis/web/cgi/rgb.html
http://www.htmlcolorcodes.org/
http://en.wikipedia.org/wiki/Web_colors
There is a better resource but I've lost the bookmark.
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