The link color is hard coded into the anarchy online client and changing it is, as far as I know, beyond the scope provided with AOML.
I suggest you send a request to funcom and ask them to enable custom colors of links in aoml and while you're at it ask them to implement some sort of table as well.
The more people that ask the more likeliy they are to implement it provided they care about their players.
Edit: Knowing the response time from FC to previous requests I would guess that taping colored plastic over the links would be the fastest way to change their colors