Steps to reproduce:

1. Create a new Unity project using the Universal 3D template
2. Install the Localization package (com.unity.localization)
3. Open the Project Settings window (Edit > Project Settings)
4. Open the Localization tab in the Project Settings window
5. Press the "Create" button
6. Press the "Save" button
7. Hover the mouse cursor over any of the Locale Selectors elements
8. Observe the hovered element

Actual results: The hover highlight is darker than in other areas of the Editor and not light theme friendly when hovered

Expected results: The hover highlight is consistent with other areas of the Editor (lighter, not as dark) to be light theme friendly

Reproducible with versions: 1.5.9 (6000.0.63f1, 6000.2.14f1, 6000.3.0f1, 6000.4.0a5 6000.5.0a2)

Tested on (OS): MacOS Silicon Tahoe 26.0.1

Notes:

• Also reproduces with the Metadata list elements