html - Change select box option background color

Question

I have a select box and I'm trying to change the background color of the options when the select box has been clicked and shows all the options.

See Fiddle

HTML:

<select>
    <option val="">Please choose</option>
    <option val="1">Option 1</option>
    <option val="2">Option 2</option>
    <option val="3">Option 3</option>
    <option val="4">Option 4</option>
</select>

CSS:

select{
    margin:40px;
    background: rgba(0,0,0,0.3);
    color:#fff;
    text-shadow:0 1px 0 rgba(0,0,0,0.4);
}

Answer 1

You need to put background-color on the option tag and not the select tag...

select option {
    margin: 40px;
    background: rgba(0, 0, 0, 0.3);
    color: #fff;
    text-shadow: 0 1px 0 rgba(0, 0, 0, 0.4);
}

If you want to style each one of the option tags.. use the css attribute selector:

select option {
  margin: 40px;
  background: rgba(0, 0, 0, 0.3);
  color: #fff;
  text-shadow: 0 1px 0 rgba(0, 0, 0, 0.4);
}

select option[value="1"] {
  background: rgba(100, 100, 100, 0.3);
}

select option[value="2"] {
  background: rgba(150, 150, 150, 0.3);
}

select option[value="3"] {
  background: rgba(200, 200, 200, 0.3);
}

select option[value="4"] {
  background: rgba(250, 250, 250, 0.3);
}

<select>
  <option value="">Please choose</option>
  <option value="1">Option 1</option>
  <option value="2">Option 2</option>
  <option value="3">Option 3</option>
  <option value="4">Option 4</option>
</select>