You can find the groups css file located at:
/groups/orca/layout/base/css/main.css
You may have to compile the groups "en" language file in the groups admin area which is a different administration link than orca forums. You probably have that area figured out though if you are messing with groups.
Second part...
I am guessing you mean when you click the "Post Reply" button you want to change the actual text color for the text of "Post Reply" right above the editor.
If so the h2 in /orca/layout/base/css/main.css should do it.
The part you need to do after making the edit is to login to dolphin admin panel, go to the orca admin area and be sure to compile the language file...click the little "en" in the upper right corner.
This writes your changes to /orca/layout/base_en/css/main.css
If you have a host with php as cgi you can directly edit that particular file and directory, but you shouldn't. If you have a php apache module host you won't be able to.
The reason that you shouldn't even if you have php as cgi and can is if you do not make the change in /base/css/main.css and later go to your orca admin and click the "en" you will recompile without the changes.
So no matter which type of host you have you should edit the base folder files then compile language then refresh the page to see if the change worked. It's a real pain and time consumer.
Same goes for groups. You will have to do the same in the groups folder, then compile groups admin area.
To get to the group admin area so you can compile "en" there. First login to admin panel the usual way. Then, type yoursite.com/groups/orca
The only issue I had when trying:
h2
{
font-size:16px;
color:#ff0000;
}
Is that it did work in firefox, but not in ie6. I would suspect that it would work in ie7 but I don't have it to verify. Almost everything I do firefox works better than any ie.
One thing about this script is every browser seems to display or do something different. I never tried safari, opera, or google chrome yet either so who knows how they look.
On a side note I did notice about your forums is it does display different in ie6 compared to ff3.
The main forum area looks normal, but:
connectionsquare.net/orca/#forum/General-Feedback-0.htm
connectionsquare.net/orca/#topic/October-Stats.htm
Are not centered, they are left aligned. But in firefox they seem to be aligned in the middle of the page.
Go figure like I said one browser does one thing and another something else. Some 3 column layouts I've noticed really mess up in ie6. IE6 is slowly fading, but it is still used often.
Sorry to ramble on.