3D widget colors are different from the original

I’m trying to render a widget on an actor with the widget component so it’s displayed in the 3D world. However, the colors that appear in the scene are completely different from the original widget’s.

Here’s the widget in UMG:

And here’s the look in-game:

I tried messing with lighting, shaders, film settings, but to no avail. Any tips on how to solve this?