Definitely needs a fallback or an easy way to toggle it.
My suggestion would be:
A display toggle in the **Display** build mode subgroup.
When **enabled**:
- use outline for C + V connections when in build mode
When disabled:
- use purple boxes for C + V connections
Purple boxes for C + V connections would always be used outside build mode.
The toggle itself would be disabled if framebuffer is disabled, and it would have a tooltip explaining that "Framebuffer needs to be enabled first"