Typescript:对象初始化时动态计算字段

我正在用Typescript构建一个设计系统，我希望根据主(必需)颜色动态计算浅色/深色的字段。设置如下:

export default class Color {
  main: string = "#000000"; //required color
  light?: string = calculateLight(this.main);
  dark?: string = calculateDark(this.main);
}

颜色对象然后在调色板类型中使用:

type ColorTypes = "primary" | "accent"; //I need this to restrict available values later in components' props
type Palette = {
  [key in ColorTypes]: Color; //created based on ColorTypes for easier code updates
};
export default Palette;

现在我想用带花括号的面板初始化主题:

export const theme: ITheme = {
  palette: {
    primary: {
      main: "#323130",
    },
    accent: {
      main: "#0078d4",
    },
  }
};

但是光和暗的区域还不清楚。

有没有办法让它自动完成？

或者唯一的方法是使用一个辅助函数createTheme which would iterate through each Color in <哪一个会迭代每一个Color in Palette and execu在Palette and执行构造函数或函数？