Steps to reproduce:
1. Create a new project
2. Create UI Document (Create > UI Toolkit > UI Document)
3. Double-click on the newly created UI Document to open UI Builder
4. Drag Visual Element to the Hierarchy
5. Open Filter dropdown section in Visual Element Inspector
6. Add Grayscale filter
7. Change Value
8. Observe UI Builder Viewport and Editor Inspector preview
Actual results: Colors differ in Viewport and Editor Inspector preview
Expected results: Both views show the same color
Reproducible with versions: 6000.3.0a1
Couldn’t reproduce with versions: 2021.3.52f1, 2022.3.62f1, 6000.0.52f1, 6000.1.9f1, 6000.2.0b7 (no Filter section)
Tested on (OS): Ubuntu 22.04, macOS Sequoia 15.4 (M4)
Note: Issue is reproducible with Opacity, Invert, Sepia, Blur, Contrast and Hue Rotate filters