[LayaAirIDE 2.0]怎么做到第二次点击color的时候lable背景颜色变回原来的颜色

this.label.bgColor = "#ff0400";
start(): void {
this.color_btn.on(Laya.Event.CLICK, this, this.onTipClick);
}
if(tipBtn == this.color_btn){
this.label.bgColor = "#ffffff";