public T setHandleOffColor(final String color) {
        handleOffColor = Color.parseColor(color);
        if(lightOnTouch) {
            handleThumb.setBackgroundColor(handleOffColor);
        }
        return (T)this;
    }
Provides the ability to programmatically set the color of the scrollbar handleThumb when unpressed. Only applies if lightOnTouch is true.
@param color to set the handleThumb when unpressed.
lib/src/main/java/com/turingtechnologies/materialscrollbar/MaterialScrollBar.java