hex和rgb颜色转换

/**
 * @description hex颜色转rgb颜色
 * @param {String} str 颜色值字符串
 * @returns {String} 返回处理后的颜色值
 */
export function hexToRgb(str: any) {
  let hexs: any = ''
  const reg = /^#?[0-9A-Fa-f]{6}$/
  if (!reg.test(str)) {
    return ElMessage.warning('输入错误的hex')
  }
  str = str.replace('#', '')
  hexs = str.match(/../g)
  for (let i = 0; i < 3; i++) {
    hexs[i] = parseInt(hexs[i], 16)
  }
  return hexs
}

/**
 * @description 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 {String} 返回处理后的颜色值
 */
export function rgbToHex(r: any, g: any, b: any) {
  const reg = /^\d{1,3}$/
  if (!reg.test(r) || !reg.test(g) || !reg.test(b)) {
    return ElMessage.warning('输入错误的rgb颜色值')
  }
  const hexs = [r.toString(16), g.toString(16), b.toString(16)]
  for (let i = 0; i < 3; i++) {
    if (hexs[i].length === 1) {
      hexs[i] = `0${hexs[i]}`
    }
  }
  return `#${hexs.join('')}`
}