import type { Colord } from "colord";
import type postcssValueParser from "postcss-value-parser";
import { AbsColor } from "./color-class";
import type { AlphaArgument, AlphaArgumentValid, FunctionArgument, NumberWithUnit, ValuesArgument, ValuesArgumentComplete } from "./parser";
export declare class ColorFromHwb extends AbsColor {
    private readonly hwb;
    constructor(hwb: HwbData | IncompleteHwbData);
    readonly type = "hwb";
    isComplete(): boolean;
    getAlpha(): number | null;
    removeAlpha(): ColorFromHwb;
    toColorString(): string;
    protected newColord(): Colord | null;
}
export type HwbValue = {
    hue: NumberWithUnit<"" | "deg" | "rad" | "grad" | "turn">;
    whiteness: NumberWithUnit<"%">;
    blackness: NumberWithUnit<"%">;
};
export type HwbData = {
    complete: true;
    rawName: string;
    hwb: ValuesArgumentComplete<HwbValue>;
    alpha: AlphaArgumentValid | null;
    extraArgs?: undefined;
};
export type IncompleteHwbData = {
    complete: false;
    rawName: string;
    hwb: ValuesArgument<HwbValue>;
    alpha: AlphaArgument | null;
    extraArgs: FunctionArgument[];
};
export declare function parseHwb(input: string | postcssValueParser.Node): HwbData | IncompleteHwbData | null;