declare namespace Ext {
    export namespace util {
        export interface ColorConfig {
            lightnessFactor?: number;
        }

        export class Color extends Ext.Base  {
            public constructor(red?: number, green?: number, blue?: number, alpha?: number);
            public createDarker(factor?: number): Ext.util.Color;
            public createLighter(factor?: number): Ext.util.Color;
            public darken(factor?: number): void;
            public getBrightness(): number;
            public getGrayscale(): number;
            public getHSL(): number[];
            public getHSV(): number[];
            public lighten(factor?: number): void;
            public setFromString(Color?: string): void;
            public setHSL(h?: number, s?: number, l?: number): Ext.util.Color;
            public setHSV(h?: number, s?: number, v?: number): Ext.util.Color;
            public toHex(color?: object): string;
            public toString(): string;
            public static fly(red?: number | string, green?: number, blue?: number, alpha?: number): Ext.util.Color;
            public static fromHSL(h?: number, s?: number, l?: number): Ext.util.Color;
            public static fromHSV(h?: number, s?: number, v?: number): Ext.util.Color;
            public static fromString(color?: string): Ext.util.Color;
        }
    }
}