I've seen this question so many times that I thought I'd make a separate post for easier forum searching (which is why I made the long subject title). If you want to see all the CSS styles and what they change on your site, check out this post.

Forum Group separator

Editor	Control Panel > Style & Colors > Forums Styles > Forum Category Background
CSS	.ForumCategoryHeader { color: #ffffff; font-size: 110%; background: #222222 url(); border: 0px; padding: 2px; margin: 1px; }

Forum Topic and Message separator

Editor	Control Panel > Style & Colors > Content Boxes > Even Rows Background Color
CSS	.AltGridRow { color:#ffffff; background:#222222 url(); }

The even rows (AltGridRow) effects both the topic listing and the forum messages. If you only want the individual posts to be separated, then use this CSS

CSS*	.MessageAuthorLinkCell1 { color:#ffffff; background:#222222 url(); } .MessageSubjectCell1 { color:#ffffff; background:#222222 url(); }

To modify the link color of that separator, add this:

CSS*	.MessageAuthorLinkCell1 a:link { color:#ffffff; } .MessageSubjectCell1 a:link { color:#ffffff; }

You can also add more styles to the links by copying the CSS above and changing the a:link to a:active, a:hover and a:visited, if you want to change those styles as well.

*Note: I only added the CSS here because I haven't checked the built in editor to see if it was possible to modify it there.

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Color key:

red	Text color
green	Background color
orange	Background image (blank in the examples. To add an image, just paste the URL inside the parenthesis - url (URL HERE)... )
blue	Font size. You can use either percent size (110%) or point size (18pt)

Alrightie, I messed something up.... and now the line that divides the Topic & Responses within the thread has vanished!

I placed all of those into my CSS.... what am I messing up? Help!

~Thanks!

You are the best, thank you!