I was just thinking about this a few days ago, funnily enough.
To me, on my laptop and desktop screens, the links look like a very dark brown admist near-black text. It's really hard to distinguish. I would suggest using a color like this: "#f38f00"
Ignoring my shoddy editing, it'd look like this:
And here are the colors lined up next to each other with the forum background:
(Left to right: Current link, current text, suggested link color)
Of course my suggestion color was basically just pulled out of a hat. Other colors that would work would be more clear browns (something like #835008) or reddish-oranges ( #cc3517 ). And by work, I mean would be clear without blinding people.
(And if you want to see those colors, toss the hexadecimals into google)