/**
 * @license
 * Copyright 2021 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import { ViewingConditions } from './viewing_conditions.js';
/**
 * HCT, hue, chroma, and tone. A color system that provides a perceptually
 * accurate color measurement system that can also accurately render what colors
 * will appear as in different lighting environments.
 */
export declare class Hct {
    private argb;
    /**
     * @param hue 0 <= hue < 360; invalid values are corrected.
     * @param chroma 0 <= chroma < ?; Informally, colorfulness. The color
     *     returned may be lower than the requested chroma. Chroma has a different
     *     maximum for any given hue and tone.
     * @param tone 0 <= tone <= 100; invalid values are corrected.
     * @return HCT representation of a color in default viewing conditions.
     */
    internalHue: number;
    internalChroma: number;
    internalTone: number;
    static from(hue: number, chroma: number, tone: number): Hct;
    /**
     * @param argb ARGB representation of a color.
     * @return HCT representation of a color in default viewing conditions
     */
    static fromInt(argb: number): Hct;
    toInt(): number;
    /**
     * A number, in degrees, representing ex. red, orange, yellow, etc.
     * Ranges from 0 <= hue < 360.
     */
    get hue(): number;
    /**
     * @param newHue 0 <= newHue < 360; invalid values are corrected.
     * Chroma may decrease because chroma has a different maximum for any given
     * hue and tone.
     */
    set hue(newHue: number);
    get chroma(): number;
    /**
     * @param newChroma 0 <= newChroma < ?
     * Chroma may decrease because chroma has a different maximum for any given
     * hue and tone.
     */
    set chroma(newChroma: number);
    /** Lightness. Ranges from 0 to 100. */
    get tone(): number;
    /**
     * @param newTone 0 <= newTone <= 100; invalid valids are corrected.
     * Chroma may decrease because chroma has a different maximum for any given
     * hue and tone.
     */
    set tone(newTone: number);
    /** Sets a property of the Hct object. */
    setValue(propertyName: string, value: number): void;
    toString(): string;
    static isBlue(hue: number): boolean;
    static isYellow(hue: number): boolean;
    static isCyan(hue: number): boolean;
    private constructor();
    private setInternalState;
    /**
     * Translates a color into different [ViewingConditions].
     *
     * Colors change appearance. They look different with lights on versus off,
     * the same color, as in hex code, on white looks different when on black.
     * This is called color relativity, most famously explicated by Josef Albers
     * in Interaction of Color.
     *
     * In color science, color appearance models can account for this and
     * calculate the appearance of a color in different settings. HCT is based on
     * CAM16, a color appearance model, and uses it to make these calculations.
     *
     * See [ViewingConditions.make] for parameters affecting color appearance.
     */
    inViewingConditions(vc: ViewingConditions): Hct;
}