Label color for slider

Hi!
I’m trying to change the label color for one of my sliders, but fail.
Do you know how to change label color of one of several sliders?
Thanks!
/Anders

With this complicated statement I managed to change color:
webix.html.addCss($$(“reserveDark”).$view.childNodes[0].childNodes[0], “styleyellow”);
but it doesn’t work for hidden sliders.
Do you know a better way?

https://webix.com/snippet/56300af5

Thanks!
I tried that but didn’t have
.webix_inp_label
in the css and then it didn’t work.