Toggle Titles

Hi Guys,

Im using the Yourself Theme.

It has a toggle feature. The toggle title uses the h4 tag. I am attempting to change the color of this header but to no avail.

I have tried to add the color:#fff; to this code in the squiggly brackets there:
#portfolio-content-single .toggle-container h4{margin-top:18px}

but nothing happens.

When I use Firebug, it tells me that the title code is in the style css under entry-content h4, I looked for that and tried to add the color there but nothing.

Firebug also told me that in custom.php there is a h4 tag. I looked in there but I dont have any clue about php so Im afraid to touch that!

Any ideas??? This has me really confused, been trying for 3 hours!!!