Hi..Thanks for the code..But that code also not working..Forum title color is not changing...I tried clearing cache also..

Hi robert...Still My forum title colors are not changed..Please can u Check this??

Just add "a" before class three for each one:

#wpforo #wpforo-wrap .wpfl-1 .wpforo-forum-title a {color:#DD0000; } 
#wpforo #wpforo-wrap .wpfl-2 .wpforo-forum-title a {color:#00DD00; } 
#wpforo #wpforo-wrap .wpfl-3 .wpforo-forum-title a {color:#0000DD; }

Tried the above code also...Not working...

I don't see it. you've not inserted or not saved. The code doesn't exist on your website. make sure you've deleted all caches.