这里需要new一个Color对象再赋值，直接设置颜色会报错
let staffRegion = new THREE.BoxGeometry(...size); //长 高 宽
let matarial = new THREE.MeshLambertMaterial({
color: color,
side: THREE.DoubleSide,
transparent: true,
opacity: 0,
});
let element= new THREE.Mesh(staffRegion, matarial);
element.material.color = new THREE.Color(color)；
