JSFiddle - React, Tailwind, and code Playground

HTML

<select id="myBox">
  <option style="color:red">
    red
  </option>
  <option style="color:blue">
    blue
  </option>
  <option style="color:green">
    green
  </option>
</select>

JavaScript

$(document).ready(function(){

	$('#myBox').change(function(){
  		var selectedColor = $('#myBox option:selected').text()
      console.log(selectedColor)
      $('#myBox ').css({'background': selectedColor, 'color' : '#FFFFFF' })
  })
})