Panel
in Red
set Advanced-> CSS .el-column {background-color:red;}
Panel
in Green
set Advanced-> CSS .el-column {background-color:green;}
Panel
in Blue
set Advanced-> CSS .el-column {background-color:blue;}
Panel
primary
Set advanced->class uk-background-primary
Panel
secondary
Set advanced->class uk-background-secondary
Panel
muted
Set advanced->class uk-background-muted
Panel
default
Set advanced->class uk-background-default

Overlay
This is an overlay. This is an overlay. This is an overlay. This is an overlay. This is an overlay. This is an overlay. This is an overlay. This is an overlay. This is an overlay. This is an overlay. This is an overlay. This is an overlay. This is an overlay.
Panel
in Red
set Advanced-> CSS .el-column {background-color:red;}
Panel
in Green
set Advanced-> CSS .el-column {background-color:green;}
Panel
in Blue
set Advanced-> CSS .el-column {background-color:blue;}

Overlay
This is an overlay. This is an overlay. This is an overlay. This is an overlay. This is an overlay. This is an overlay. This is an overlay. This is an overlay. This is an overlay. This is an overlay. This is an overlay. This is an overlay. This is an overlay.
Panel
primary
Set advanced->class uk-background-primary
Panel
secondary
Set advanced->class uk-background-secondary
Panel
muted
Set advanced->class uk-background-muted
Panel
default
Set advanced->class uk-background-default