Steps to reproduce:

1. Open a Unity project
2. Open the lighting window via Window > Rendering > Lighting
3. At the top right of the window, hover over the toolbar icons (Reference Question Mark icon and Settings Cog icon)

Actual results: The Hover behaviour is barely noticeable unless you look really closely: 

!image-2024-09-30-10-30-38-789.png!

Expected results: The Hover behaviour is noticeable and the user can see the background lighten up: 

!image-2024-09-30-10-31-58-927.png!

Reproducible with versions: 6000.0.22f1, 6000.0.7f1

Not reproducible with versions: 6000.0.6f1, 2022.3.48f1, 2021.3.44f1, 7000.0.0a3

Can’t test with versions: - 

Tested on (OS): Windows 10/11

Notes: 

• At first, I thought the Hover behaviour was completely broken as it is so hard to see.