import { interpolateBrBG } from 'd3-scale-chromatic';
import type { ColorScheme } from '../types.js';
export declare const categoricalSchemes: Map<string, readonly string[]>;
export declare function isCategoricalScheme(scheme: string): boolean;
type SchemeGetter = (n: number) => readonly string[];
export declare function isOrdinalScheme(scheme: ColorScheme): boolean;
export declare function ordinalScheme(scheme: string): SchemeGetter | undefined;
export declare function ordinalRange(scheme: string, length: number): readonly string[] | undefined;
export declare function maybeBooleanRange(domain: boolean[], scheme?: string): unknown[] | undefined;
export declare function isQuantitativeScheme(scheme: string): boolean;
export declare function quantitativeScheme(scheme: string): typeof interpolateBrBG | undefined;
export declare function isDivergingScheme(scheme: string): boolean;
export {};