Landscape Material not representing colors accuratly


I have a landscape with a landscape material applied to it, but the albedo colors seem incredibly muted on it.
Here is a screenshot where I simply plugged a 1,0,0 Constant into the Albedo (for debug purposes), a 0 into the metallic and a 0.9 into the Roughness.
This is in LIT Mode
Plantation - Unreal Editor.jpg
This is in Unlit More
As you can see, the asset next to it seems completly fine, so I can’t really see the lighting setup being the problem (it’s basically only a directional light)

Here are the settings of the material:

I remember that we had a very similar problem when we worked on Dead Island 2, but I can’t remember how we fixed it.

Any Ideas?