GUI.Box displays wrong background color after changing scaling in Windows

Reproduction steps:
1. Open the attached "1355962.zip" project
2. On your desktop click the right mouse button and go to Display settings
3. Go to Scale and layout (Display > Scale and layout)
4. Click on the first drop-down menu and change it from 100% (Recommended) to 125%
5. In the Unity Editor click on the ErrorTester GameObject
6. In the Inspector (Window > Windows > Inspector) go to GUI Color Error Tester (Script) and compare the background colors of Color To Test and GUI.Box

Expected result: The background colors of the Color To Test and the GUI.Box are the same
Actual result: The background colors of the Color To Test and the GUI.Box are different

Reproducible with: 2019.4.29f1, 2020.3.16f1, 2021.1.17f1, 2021.2.0b7, 2022.1.0a5

Note: On macOS, the bug is reproducible without changing the scaling