颜色转换：十进制如何转hex类型

方法一：

const getred = (color) => {
  const red = (color & 0xff0000) >> 16;
  return red;
};
 
const getgreen = (color) => {
  const green = (color & 0x00ff00) >> 8;
  return green;
};
 
const getblue = (color) => {
  const blue = color & 0x0000ff;
  return blue;
};

方法二：

const Rgb2Hex = (color) => {=
  const r = getred(color);
  const g = getgreen(color);
  const b = getblue(color);
  const hex = "#" + ((1 << 24) + (r << 16) + (g << 8) + b).toString(16).slice(1);
  return hex;
}