GTK Theme for IDE?

Is it possible to set the GTK theme used for the IDE?

When I open my IDE my normal theme is pretty dark and the IDE doesn’t quite look right.

I’ve tried the GTK_THEME environment variable but Xojo seems to ignore that, not sure what else to do at this point.

Nvm,
If anyone else is looking for a solution to this GTK_DATA_PREFIX variable works.

IDE for me on standard Ubuntu theme looks bad, not as dark as you post above but has strange black banners that make no sense. At bottom and in the toolbar.

I’m using Arc dark theme as a default theme and BlueBird theme for Xojo only.