I would like to know what genius come with an idea to have border around any reference image. I know i can import Image as a poly plane, but i really like the options of reference images. i can set in which view will be visible or if is visible over geo or in the back. Earlier versions of Blender didn’t have this nonsense issue…
It’s just a outline color for an object… does not make sense to make it invisible… then users ould complain about the unvisibility of the borders of their objects…
May be make it a bit more pleasant fro you by changing the outline color of an empty in Blender Preferences → Themes → 3d Viewport → Empty ?