Plasma root dolphin alert colors

I don't know if this is a plasma or a suse issue... When user launches dolphin-su a little alert appears, which is a useful flag but I used to have an even better one that could not be just clicked OFF and forgotten. I used to set, as root, a background color of reddish orange so that when any user called dolphin-su that window would be in root's colours. UNFORTUNATELY this feature is now dead, dolphin-su shows up indistinguishably dressed in user colors :-(