export declare class Utility {
    static replaceAll(str: string, find: string, replace: string): string;
    static escape(value: string): string;
    static contrastRatio(color1: string, color2: string): number;
    static luminanace(r: number, g: number, b: number): number;
    static addClass(el: any, name: string): void;
    static removeClass(el: any, name: string): void;
    static swapClass(el: any, first: string, second: string): void;
}