import { CSSProperties } from 'react';
import { ColorValue } from '../themeProvider/color.types.js';
/** The class, and for a colour of the caller's own the inline style, that set the --tone properties. */
export declare function toneProps(color: ColorValue): {
    className: string;
    style?: CSSProperties;
};
/** A colour as a CSS value, for a component that paints it itself rather than through --tone. */
export declare function cssColor(color: ColorValue): string;
/** Warns in development about a value that can never be a colour. A var() passes: it only resolves on screen. */
export declare function useToneCheck(component: string, colors: (ColorValue | undefined)[]): void;