js rgba与十六进制的相互转换

 

const rgbaToHex = (rgba: number[]): string => {
  let hex = '#';
  for (const i of rgba) {
    hex += i.toString(16).padStart(2, '0');
  }
  return hex;
}

const hexToRgba = (hex: string): number[] => {
  const rgba = [];
  hex = hex.replace('#', '').padEnd(8, 'F');
  for (let i = 0; i < hex.length; i+=2) {
    rgba.push(parseInt(hex.slice(i, i+2), 16))
  }
  return rgba;
}