import { EventEmitter, OnInit } from '@angular/core';
export declare class RcContrastColorsComponent implements OnInit {
    label: string;
    active: boolean;
    clickCallback: EventEmitter<any>;
    private colorsContrastClass;
    ngOnInit(): void;
    /**
     * add / remove the contrast colors class from body
     */
    toggle(): void;
    /**
     * check if body has the colors contrast class
     * @returns boolean
     */
    hasClass(): boolean;
}