/**
 * OKLCH colour utilities used across the Fluent Grow colour system.
 */
export interface OKLCHColor {
    l: number;
    c: number;
    h: number;
    alpha?: number;
}
/**
 * Serialises a colour structure into a CSS `oklch()` string.
 */
export declare function toOKLCH({ l, c, h, alpha }: OKLCHColor): string;
/**
 * Parses a CSS `oklch()` string into a colour structure. Returns null when the
 * value cannot be parsed.
 */
export declare function fromOKLCH(value: string): OKLCHColor | null;
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