Steps to reproduce:
1. Create new Unity project
2. Make sure Editor theme is set to Light
3. Create a new "Cube" GameObject (GameObject > 3d Object > Cube)
4. Open the Animation window (Window > Animation > Animation)
5. Create a new animation by pressing the "Create" button in the Animation window
6. Open the Animator window (Window > Animation > Animator)
7. In Animator window press “Add Property”
8. Select Cube (Mesh Filter) or Mesh Renderer Properties
9. Observe properties icons when selected

Actual results: Cube (Mesh Filter) or Mesh Renderer Properties are barely visible when selected and blue highlight is on
Expected results: Cube (Mesh Filter) or Mesh Renderer Properties should be visible when selected

Reproducible with versions: 6000.0.64f1, 6000.2.15f1, 6000.3.2f1, 6000.4.0b1, 6000.5.0a3

Tested on (OS): macOS Tahoe 26.1 (M1)