Default Color Grading darkens the whole scene, why?

I wanted to use color grading for some film effects but when I plug in the default one from this doc

it comes out completely dark. making any color grading following impossible. any idea why this happens and how to fix it?

oh my goodness thank you! i knew i was missing something simple. i feel dumb now.

Open up the texture in content browser and set it’s Texture Group to ColorLookupTable.