import type { Space } from './core/convert.js';
/** Interactive OKLCH L×C plane bound to a host element + an onChange callback. */
export declare class AreaPicker {
    #private;
    constructor(root: HTMLElement | null, onChange: (css: string, dragging: boolean) => void);
    /** Adopt a colour from any CSS string, projected onto the OKLCH plane. */
    setValue(css: string): void;
    /** Stretch the plane to `gamut` (the current mode's gamut). The gradient extent
     *  and the inner boundary lines both follow from it. */
    setStretch(gamut: Space): void;
    unmount(): void;
}