颜色字符转换

颜色字符转换

题目描述： 将 rgb 颜色字符串转换为十六进制的形式，如 rgb(255, 255, 255) 转为 #ffffff

 

function rgbToHex(rgbString) {
  const rgbArray = rgbString.substring(4, rgbString.length - 1).split(", ");
  const hexArray = rgbArray.map(color => {
    const hexColor = Number(color).toString(16);
    return hexColor.length === 1 ? "0" + hexColor : hexColor;
  });
  const hexString = "#" + hexArray.join("");
  
  return hexString;
}
const rgbString = "rgb(255, 255, 255)";
const hexString = rgbToHex(rgbString);
console.log(hexString); // 输出 "#ffffff"