import { Contrast as Diagnostic } from "../diagnostic/contrast.ts";
import { Err, Ok } from "@siteimprove/alfa-result";
export declare namespace Contrast {
    const HasSufficientContrast: (highest: number, threshold: number, pairings: Array<Diagnostic.Pairing<["foreground", "background"]>>) => Ok<Diagnostic<["foreground", "background"]>>;
    const HasInsufficientContrast: (highest: number, threshold: number, pairings: Array<Diagnostic.Pairing<["foreground", "background"]>>) => Err<Diagnostic<["foreground", "background"]>>;
}
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