Text color and outline color are not previewed correctly when opening the UI builder

Reproduction steps:

1. Open the user's attached project
2. Open Assets > Bug.uxml
3. In UI Builder select Label “DynamicColor”
4. Observe Text Color and Outline Color

Expected result: Shown the same colors as visible in the Viewport
Actual result: Black color is shown

Reproduced with: 1.0.0 (2023.1.0a3, 2023.1.0a4)
Not reproduced with: 1.0.0-preview18 (2020.3.37f1), 1.0.0 (2021.3.7f1, 2022.1.10f1, 2022.2.0b2, 2023.1.0a2)

Reproducible on: Windows 11