/**
 * Validates a hex color string (3, 4, 6, or 8 digits with optional #).
 */
export declare const isValidHex: (hex: string) => boolean;
/**
 * Parses a hex color string into RGBA components.
 * Returns { r: 0, g: 0, b: 0, a: 1 } for invalid inputs.
 */
export declare const hexToRgb: (hex: string) => {
    r: number;
    g: number;
    b: number;
    a: number;
};
/**
 * Converts a hex color to an 8-digit hex string (#RRGGBBAA).
 */
export declare const hexToHex8: (hex: string) => string;
/**
 * Converts a color value to a normalized { hex, rgb } object.
 * Handles transparency and validity checks.
 */
export declare const getColor: (colorValue: string, showTransparencyControl: boolean) => {
    hex: string;
    rgb: {
        r: number;
        g: number;
        b: number;
        a: number;
    };
};