import { type SRGB } from "../srgb/srgb.js";
/**
 * @remarks
 * Based on:
 *
 * - https://github.com/neilbartlett/color-temperature/blob/develop/index.js
 * - http://www.zombieprototypes.com/?p=210
 *
 * Uses adjusted coefficients to produce normalized sRGB values.
 *
 * @param out - result
 * @param kelvin - color temperature
 * @param alpha - target alpha channel
 */
export declare const kelvinRgb: (out: SRGB | null, kelvin: number, alpha?: number) => SRGB;
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