Slider icons

Thank you, I really like your plugin!

just have a look at this image.
one thing is, that your one is blue if I would like to change the color or arrow look!? like we use our own icon?
image
and if you have a close look at the image, you will see this mini arrow, I guess, it comes from WordPress, next and previous page, SVG icons.

here is the https://www.netdoktor.de/krankheiten/nagelpilz/

if you have a look at this slider, the buttons are down and indicate clearly that there is a slider, slider with a blue button-down.
could this be possible?

Thanks