import type { Rgba } from "./color.js";
export declare const MIN_WARN_PX = 16;
export declare const MIN_ERROR_PX = 14;
export declare function contrastLc(fg: Rgba, bg: Rgba): number;
export declare function requiredPx(lc: number, weight: number): number | null;
export declare function neededLc(px: number, weight: number): number | null;