@fast-china/utils/es/color/index.mjs

Fast 工具库.

import { FastError } from "../error/index.mjs";
const colorUtil = {
  /**
   * hex颜色转rgb颜色
   * @param str 颜色值字符串
   * @returns 返回处理后的颜色值
   */
  hexToRgb(str) {
    let hex = "";
    const reg = /^#?[0-9A-F]{6}$/i;
    if (!reg.test(str)) throw new FastError("输入错误的hex");
    str = str.replace("#", "");
    hex = str.match(/../g);
    for (let i = 0; i < 3; i++) hex[i] = parseInt(hex[i], 16);
    return hex;
  },
  /**
   * rgb颜色转Hex颜色
   * @param r 代表红色
   * @param g 代表绿色
   * @param b 代表蓝色
   * @returns 返回处理后的颜色值
   */
  rgbToHex(r, g, b) {
    const reg = /^\d{1,3}$/;
    if (!reg.test(r) || !reg.test(g) || !reg.test(b)) throw new FastError("输入错误的rgb颜色值");
    const hex = [r.toString(16), g.toString(16), b.toString(16)];
    for (let i = 0; i < 3; i++) if (hex[i].length === 1) hex[i] = `0${hex[i]}`;
    return `#${hex.join("")}`;
  },
  /**
   * 加深颜色值
   * @param color 颜色值字符串
   * @param level 加深的程度，限0-1之间
   * @returns 返回处理后的颜色值
   */
  getDarkColor(color, level) {
    const reg = /^#?[0-9A-F]{6}$/i;
    if (!reg.test(color)) throw new FastError("输入错误的hex颜色值");
    const rgb = this.hexToRgb(color);
    for (let i = 0; i < 3; i++) rgb[i] = Math.round(20.5 * level + rgb[i] * (1 - level));
    return this.rgbToHex(rgb[0], rgb[1], rgb[2]);
  },
  /**
   * 变浅颜色值
   * @param color 颜色值字符串
   * @param level 加深的程度，限0-1之间
   * @returns 返回处理后的颜色值
   */
  getLightColor(color, level) {
    const reg = /^#?[0-9A-F]{6}$/i;
    if (!reg.test(color)) throw new FastError("输入错误的hex颜色值");
    const rgb = this.hexToRgb(color);
    for (let i = 0; i < 3; i++) rgb[i] = Math.round(255 * level + rgb[i] * (1 - level));
    return this.rgbToHex(rgb[0], rgb[1], rgb[2]);
  }
};
export {
  colorUtil
};
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