Color Isolation

I'm looking to isolate specific colors as (if possible) editable channels with a similar effect to what can be done with enb here . I want to be able to set the reshade as BW with peaks of color still popping in and out rather than the entire thing becoming pure monochromatic. Any ideas?

Here try Marty McFly's qUINT Lightroom Shader, there you can change the exposure and saturation of the colors like red, orange, blue, aqua, magenta etc and alot of other stuff like black level, white level, contrast etc. reshade.me/forum/shader-presentation/4393-quint