[解決済み] チェックボックスを透明にするには

#checkbox {
  width: 20px;
  height: 20px;
  cursor: pointer;
  vertical-align: bottom;
  color: black;
  background-color: rgba(0, 0, 0, 0.08);
}

<div class="checkbox check-transparent">
  <label>
      <input type="checkbox" id="checkbox">Onthoud mij
  </label>
</div>

#checkb {
    width: 20px;
    height: 20px;
    cursor: pointer;
    background: rgba(40,40,40,0.2);
    color:black;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    border: none;
    position: relative;
    left: -5px;
    top: -5px;
}

#checkb:checked {
    background: rgba(40,40,40,0.7);
}


.checkbox-container {
    position: absolute;
    display: inline-block;
    margin: 20px;
    width: 100px;
    height: 100px;
    overflow: hidden;
}

<div class="checkbox-container">
<input type="checkbox" id="checkb"/> Input
</div>