Hi Jenn,
Since the usual Windows color, contrast, and filter settings have already been covered, I’d suggest checking whether Night light is affecting the display:
- Go to Settings > System > Display.
- Turn Night light Off if it is enabled.
- Restart the PC and check the colors again.
If the dark or unusual colors remain, could you share a screenshot as suggested by the Independent Advisor that would help determine whether this is a Windows theme/display setting or something specific to the display itself.
I hope this helps narrow it down.