Reproduction steps:
1. Create a new HDRP project
2. Import the attached user's custom package "issue_package.unitypackage"
3. Open the "Bug.unity" Scene under "Assets/__Prototypes/Matt/V3/Bug.unity" and add a Camera
4. Open the VFX graph under "Assets/__Prototypes/Matt/V3/VFX Issue.vfx"
5. Zoom in the Game View
6. Observe the color
7. In the VFX graph change the node output from Color to Sample Gradient

Expected result: Color and Gradient Properties output the same color values
Actual result: Color and Gradient Properties doesn't output the same color values (See attached issue_screenshot.jpg)

Reproduces on: VFX 10.9.0, 12.1.7, 13.1.8 (2020.3.37f1, 2021.3.6f1, 2022.1.9f1)
Does not reproduce on: VFX 14.0.3, 15.0.0 (2022.2.0b2, 2023.1.0a4)