I want to just turn it off. If I change the color, then change dark themes, I'd be out of luck if the background wasn't black.
Tooltip text color is coming from system, but tooltip background is light yellow. I thought it was white b/c it's so light. It might be qt4config setting, but that is inconsistent here, among apps. I may have not installed some theme engine or something.
Anyhow, big ups to you.