Small color changes

Is it possible to change the color of the tabs/ overlays (active and default) without creating an entirely new jquery theme?

I was hoping to be able to just change the color of these images from the gray theme:

.tag-groups-cloud-tabs .ui-widget-header { border: 1px solid #aaaaaa; background: #cccccc url(images/ui-bg_highlight-soft_75_cccccc_1x100.png) 50% 50% repeat-x; color: #222222; font-weight: bold; }

and

.tag-groups-cloud-tabs .ui-widget-overlay { background: #aaaaaa url(images/ui-bg_flat_0_aaaaaa_40x100.png) 50% 50% repeat-x; opacity: .30;filter:Alpha(Opacity=30); }

but I can’t see where they are located. Where are these images? Are they hosted elsewhere? Or are they somewhere in my folders?

Thanks!

http://ww.wp.xz.cn/extend/plugins/tag-groups/