随机获取颜色JS

function getRandomSafeColor() {
      const base = ['00', '33', '66', '99', 'CC', 'FF']
      const len = base.length
      const bg = []
      const random = Math.ceil(Math.random() * 215 + 1)
      let res
      for (let r = 0; r < len; r++) {
        for (let g = 0; g < len; g++) {
          for (let b = 0; b < len; b++) {
            bg.push('#' + base[r].toString() + base[g].toString() + base[b].toString())
          }
        }
      }
      for (let i = 0; i < bg.length; i++) {
        res = bg[random]
      }
      return res
    }