Poor visibility of Save button in "Light" Editor theme

Steps to reproduce:

1. Create  a project (Universal 2D)
2. Set Unity theme to "Light"
3. Go to the "Project" window
4. Click "Create" -> Shader Graph -> Blank Shader Graph
5. Double-click it and verify that the "New Shader Graph" window opens
6. Observe the "Save" button displayed next to the floppy disk icon

Actual results: The "Save" button is poorly visible.

Expected results: The "Save" button should be more visible and brighter.

Reproducible with versions: 17.0.4(6000.0.53f1), 17.1.0(6000.1.11f1), 17.2.0(6000.2.0b9) 17.3.0(6000.3.0a2)

Not reproducible with versions: -

Can’t test with versions: -

Tested on (OS): M1 Max - Sequoia 15.5