Post Process material looks dark

Hey there. I want to create a post proccesing material, but I’m runnning into an annoying problem: everything is way darker than it should be. I’ve tried creating this:

And it still makes everything look much more darker. It’s not an issue related to the eye exposure: it’s disabled
Any ideas? What I’m doing wrong?

Set Blendable Location of the material to Before Tonemapping.

Thank you!

The “Before ToneMapping” would cause other artifact, like color be affected by blooming.
I found following function works for me.