export default function hexToRgba(hex, alpha = 1) {
  // 去除 # 符号
  hex = hex.replace('#', '');

  // 处理 3 位和 6 位十六进制颜色码
  if (hex.length === 3) {
    hex = hex[0] + hex[0] + hex[1] + hex[1] + hex[2] + hex[2];
  }

  // 解析红、绿、蓝通道的值
  const r = parseInt(hex.slice(0, 2), 16);
  const g = parseInt(hex.slice(2, 4), 16);
  const b = parseInt(hex.slice(4, 6), 16);

  // 生成 rgba 字符串
  return `rgba(${r}, ${g}, ${b}, ${alpha})`;
}