HarmonyOS 如何返回一个颜色？

export class ColorInfo {  
  readonly name:string;  
  readonly des:string;  
  readonly r:string;  
  readonly g:string;  
  readonly b:string;  
  readonly opacity:string;  
  
  constructor(name:string, des: string, r: string, g: string, b: string, opacity?: string) {  
    this.name = name;  
    this.des = des;  
    this.r = r;  
    this.g = g;  
    this.b = b;  
    this.opacity = opacity ?? '1';  
  }  
  
  getColor(): Color{  
  
    //这里要如何处理返回一个颜色  
  }  
}