a version of the Fruity theme.
I suppose the color of the handle is set in this yours version.
In standard fruity it looks like this (depending on the setting of "Slider initial value set at start")
Or do you use a workaround to hide the handle, until it is touched.
I remember there was this wish some time ago.
But nevertheless: You may change by setting these classes in your "custom.css"
Code:
.slider-handle {
background-color: #702000;
}
.slider-handle.custom::before {
color: #702000;
}
.slider.slider-untouched .slider-handle {
background-color: transparent;
}
.slider.slider-untouched .slider-handle.custom::before {
color: #bbb;
}