import { FlattenSimpleInterpolation } from 'styled-components';
import type { StylableComponent } from '@brix-ui/types/component';
/**
 * Creates CSS custom properties from the provided object and their default values
 */
export declare function createCustomProperties<CP extends StylableComponent<string>['customProperties']>(customProperties: CP | undefined, defaultValues: Record<keyof Required<NonNullable<CP>>, string | undefined>): FlattenSimpleInterpolation;