/**
 * The color math the brand ramp needs, ported from colorjs.io (MIT) so the library does not
 * ship all of it: OKLCH, CIE Lab D50, sRGB and Display P3, plus CSS Color 4 gamut mapping.
 * Matrices and thresholds are colorjs.io's, so results match `colorjs.io/fn` to the hex digit.
 */
type Vector = [number, number, number];
/** Lightness, chroma, hue. A powerless hue is `null`, as in colorjs.io. */
export type Oklch = [number, number, number | null];
export declare const srgbToOklch: (rgb: Vector) => Oklch;
export declare const p3ToOklch: (rgb: Vector) => Oklch;
export declare function hexToSrgb(hex: string): Vector;
export declare const hexToOklch: (hex: string) => Oklch;
export declare function deltaEOK(a: Oklch, b: Oklch): number;
/** Interpolates in CIE Lab, colorjs.io's default interpolation space. */
export declare function mixLab(a: Oklch, b: Oklch, amount: number): Oklch;
export declare function srgbToHex(rgb: Vector, alpha?: number): string;
export declare const oklchToHex: (color: Oklch) => string;
export {};
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