/**
 * Pick the better of black/white text for a given background using actual
 * contrast ratios, not a simple luminance cutoff.
 *
 * @param background - Background color in hex or rgb/rgba format (e.g., '#FFFFFF' or 'rgb(255, 255, 255)')
 * @param minContrast - Preferred minimum contrast ratio for body-sized text
 * @returns '#000000' for light backgrounds, '#FFFFFF' for dark backgrounds
 */
export declare function pickBlackOrWhiteTextColor(background: string, minContrast?: number): '#000000' | '#FFFFFF';
/**
 * Backwards-compatible alias for callers that want the best black/white text
 * color for a background.
 */
export declare function getTextColorForBackground(background: string): '#000000' | '#FFFFFF';
