export type OklchColorValue = {
    l: number;
    c: number;
    h: number;
    alpha?: number;
};
export type SrgbColorValue = {
    r: number;
    g: number;
    b: number;
};
export type ResolvedColorValue = {
    hex: string;
    rgb: SrgbColorValue;
    oklch: OklchColorValue;
    clipped: boolean;
    clippedChromaDelta: number;
};
export declare function parseCssColorToOklchValue(value: string): OklchColorValue;
export declare function resolveOklchToSrgbValue(input: OklchColorValue): ResolvedColorValue;
export declare function resolveOklchToLabCssValue(input: OklchColorValue): string;
export declare function resolveOklchToDisplayP3CssValue(input: OklchColorValue): string;
export declare function relativeLuminanceValue(value: string): number;
export declare function contrastRatioValue(foreground: string, background: string): number;
export declare function apcaContrastScore(foreground: string, background: string): number;