JSFiddle - React, Tailwind, and code Playground

HTML

<select class="dropdown">
  <option value="volvo">Volvo</option>
  <option value="saab">Saab</option>
  <option value="mercedes">Mercedes</option>
  <option value="audi">Audi</option>
</select>

CSS

.dropdown
{
    
    background-color: Blue;
    font-size: 15px;
    padding-top: 10px;
    padding-bottom: 10px;    
}