dbweb-common/lib/services/theme.service.d.ts

用`yarn add dbweb-common`安装，不要忘记修改`angular.json`里的 `architect\build\options\assets`,加上

import { Observable } from 'rxjs';
export declare type ThemeColor = 'blue' | 'deep-purple' | 'pink' | 'orange' | 'green';
export declare type ThemeModel = 'light' | 'dark';
export declare class ThemeService {
    private _theme;
    theme: Observable<{
        name: string;
        color: ThemeColor;
        model: ThemeModel;
    }>;
    setTheme(val: string): void;
}