I copied a viewport from the greyscale file to my own file and put them next to eachother.

When I print my own viewport the problem appears.

When I print from the copied viewport the colors are correct.

I selected them both and checked the properties tab, but there are no vissible diffrences there, not even in the 'essentials' tab.

I tried Matchprop but that doesn't work.

Where can I find the overrides?