import { NullObject } from './cache.js';
import { Options } from './typedef.js';
/**
 * resolve color
 * @param value - CSS color value
 * @param [opt] - options
 * @returns resolved color
 */
export declare const resolveColor: (value: string, opt?: Options) => string | NullObject;
/**
 * resolve CSS color
 * @param value - CSS color value. system colors are not supported
 * @param [opt] - options
 */
export declare const resolve: (value: string, opt?: Options) => string | null;