how to separate posts using css?

First topic message reminder :


I've made them red so it's easy to see them. I'd like them to be the colour blue you can see in the pic but when I change the colour in acp it also changes this colour:

I want these bits to be white.
Or is there any other way to separate posts efficiently?

my forum's phpbb2

omg, thanks it works perfectly!

Thanks for the help again Ace .

Topic solved and archived ~ brandon_g