Change the 'option' color with the attribute 'disabled'

It can't be both selected and disabled.

option:disabled {
  color: red;
}

<select>
  <option selected>Choose something</option>
  <option disabled>1</option>
  <option>2</option>
  <option>3</option>
</select>

If you want to disable the select, instead of the option you need to moved disabled to the select tag

select:disabled {
  color: red;
}

<select disabled>
  <option selected>Choose something</option>
  <option>1</option>
  <option>2</option>
  <option>3</option>
</select>

Try this:

CSS:

    select{
    color:red;
    }
    option{
    color:black;
    }

try this, hope it will work: in html:

    <select>
      <option value="">Choose something</option>
       <option disabled="disabled" value="" class="red">1</option>
       <option disabled="disabled" value="" class="red">2</option>
       <option disabled="disabled" value="" class="red">3</option>
    </select>

in CSS:

   select :disabled.red{
   color: red;
   }