How to make the last of the active blocks a different color in css?

Question

opencart

Good day.
I'm making a slider (using the slick plugin), a problem arose, I need to remove the margin-right for the last of the active (those that the user currently sees) elements, but I still can't.
Simplified example: https://jsfiddle.net/w1uafe0r/7/ (you need to change the color of the last green block)
UPD : updated the example, led to a more truthful version
UPD 2 : forgot to add, it would be nice if the solution was not tied to the number active (there may be fewer of them)
UPD 3 : I updated the example again, again more truthful (the color and martig need to be changed just for the content), I'm sorry.
Maybe you have some ideas, thanks.

Answer 1

It seems to have solved the problem
. I chose SEO PRO in the cnc settings and oc_seo_urladded a line to the table where query = common / home, and the keyword is empty.
and everything started working fine.

Answer 2

https://jsfiddle.net/w1uafe0r/4/
for a more truthful version
https://jsfiddle.net/w1uafe0r/5/

Answer 3

You just need to replace this line with this one: And you won't have to look for any "last active elements"!