Inserting image instead of rgb color in theme

[Mobius]

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Hello, i've got something like this in global css of my forum:

.thead {
background: #303B4A;
color: #ffffff;
padding: 8px 8px 8px 15px;


I would like to insert an image to background instead of color, how it can be done?

edit:

I'm sorry for another issue I resolved by myself....

background: url(image_direct_link);
i.e.

Code:[Highlight]

background: url(http://www.someimagehost.com/image.jpg);