/**
 * Color utility functions
 * Color conversion and manipulation utilities
 */
/**
 * Convert integer RGB to array
 */
export declare function intToRGBA(int: number): [number, number, number, number];
/**
 * Convert RGB array to integer
 */
export declare function rgbaToInt(r: number, g: number, b: number, a?: number): number;
/**
 * Convert RGB to LAB color space
 */
export declare function rgb2lab(rgb: [number, number, number]): [number, number, number];
/**
 * Calculate color distance in LAB color space
 */
export declare function labColorDistance(lab1: [number, number, number], lab2: [number, number, number]): number;
/**
 * Calculate color distance between two RGB colors
 */
export declare function colorDistance(rgb1: [number, number, number], rgb2: [number, number, number]): number;
/**
 * Convert hex color to RGB
 */
export declare function hexToRgb(hex: string): [number, number, number] | null;
/**
 * Convert RGB to hex
 */
export declare function rgbToHex(r: number, g: number, b: number): string;
/**
 * Blend two colors
 */
export declare function blendColors(color1: [number, number, number], color2: [number, number, number], factor: number): [number, number, number];
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