Flat Color Material which is excluded from Post Process like color on Debug Lines/Arrow

Hello everyone!

I’m trying to create a material that is visible in the Editor and is excluded from Post Process without a post process materials and custom stencil buffers shenanigans. The material that will just look like a flat color ignoring lighting and post process/tone mapping. Just like how debug arrow looks like:

Is there a way?
I’ve tried unlit, but it’ll be still affected by Post Process and bloom in particular.
I want a material that completely ignores all of that.