Material emissive color input gives incorrect color/weak glow

On UE 14.3 everything works fine (Top Down Shooter blueprint project):

Now on UE 15 (Top Down Shooter blueprint project):

Notice the weak glow and broken color even tho both pictures use the same settings.

This was my first UE 15 project so I do not recall having touched anything that would cause this. I tried to tweak the material settings and post process effects to find a fix/work around but with no aval.

This is a result of tonemapper changes in 4.15. You might need to re-ballance your emissive values to get the same look. More information here.