import { Observable } from 'rxjs/Observable';
export declare class MatColorPickerService {
    /**
     * Array of all used colors
     */
    private _colors;
    /**
     * Add new color to used colors
     * @param color string
     */
    addColor(color: string): void;
    /**
     * Return Observable of colors
     */
    getColors(): Observable<string[]>;
}