How to change css style for glyphicon bootstrap?

Question

css

You need to style glyphicon bootstrap in carousel, namely left and right arrows .
It seems that everything should be just like with a font. But I can’t make the arrow thinner and black on a gray background.

Answer 1

You won't change it. Try including fontawesome and use fa-angle-left and fa-angle-right. They are thin and fit better.

Answer 2

need to do so

Answer 3

What are these? It's just that all the psychics are on vacation.