JSFiddle - React, Tailwind, and code Playground

HTML

<select class="select_box">
    <option class="itemone" value="0">Your device is turned OFF</option>
    <option class="itemtwo" value="1">Your device is turned ON</option>
</select>

CSS

.select_box
{
    color: white;
    background-color: red;
}

.itemone
{
    background-color: red;
}

.itemtwo
{
    background-color: green;
}

JavaScript

$(document).ready(function() {
   $(".select_box").change(function(){
      if($(".select_box").find(":selected").val() == '1'){
         $(".select_box").css('background','green');
      }
      else{
         $(".select_box").css('background','red');
      }
   });
});