How to change spinner circular width and indication color

Please find my style

        static lv_style_t style_spinner;
        lv_style_init(&style_spinner);
        lv_style_set_line_color(&style_spinner,LV_STATE_DEFAULT, LV_COLOR_WHITE);
        lv_style_set_line_width(&style_spinner,LV_SPINNER_PART_BG, 2);
//loader
        lv_obj_t *loader=lv_spinner_create(lv_scr_act(),NULL);
        lv_obj_set_size(loader,75,75);
        lv_obj_add_style(loader,LV_SPINNER_PART_BG,&style_spinner);
        lv_obj_align(loader,NULL,LV_ALIGN_CENTER,0,30);

the above code gives me below output. but spinner indicator color and indicator width not changed.