How to style first and last visible slide in owl carousel 2?

Question

css

There is an owl carousel consisting of a different number of elements displayed by the site engine and 4 of them are visible, i.e. with class "active". According to the layout, I want to make the first and last visible block darkened.
Tried using pseudo-classes in CSS - didn't work. I don’t know how else to do it, with minimal crutches and maintaining adaptability. I would appreciate help or guidance.

Answer 1

Something like this