Set JQuery UI modal dialog overlay background color
That is in this css element:
.ui-widget-overlay {
background: #AAA url(images/ui-bg_flat_0_aaaaaa_40x100.png) 50% 50% repeat-x;
opacity: .30;
filter: Alpha(Opacity=30);
}
it is on line 294 of: jquery-ui-1.8.11.custom.css
Add this CSS to your stylesheet:
.ui-widget-overlay
{
opacity: .50 !important; /* Make sure to change both of these, as IE only sees the second one */
filter: Alpha(Opacity=50) !important;
background: rgb(50, 50, 50) !important; /* This will make it darker */
}
Easiest way is to use the themeroller.