I’m on Nobara Linux (with KDE6) using a dark theme. I’m using Unity Mod Manager on some games, which, with my current configuration has unreadable text on buttons etc because the text color is the same as the button-background.

When I switch the color in the settings to a light-mode theme like Breeze, everything in Unity Mod Manager becomes perfectly readable.

How do I force a single application to use light mode and/or a specific color-scheme?