Sorry for the lag in reply! Photoshop uses color correction/color spaces, and XD uses raw device colors.
If you're looking for color space management, you should upvote this story in UserVoice: Color Managed Application – Adobe XD Feedback : Feature Requests & Bugs
Do you know by any chance if there's a way I can affect that outside of XD, say in MacOS settings somewhere. I mean to make colors in XD less saturated (similar to Photoshop)