JSFiddle - React, Tailwind, and code Playground

HTML

<ol>
    <li>Hola</li>  <li>Hola</li>  <li>Hola</li>  <li>Hola</li>  <li>Hola</li></ol>

CSS

/*ol li:first-letter {color:red;}*/
/*ol li:first-child {color:red;}*/
/*ol li:before {content:"lower-alpha";}*/
/*ol li:before:first-letter {content:"lower-alpha";}*/
/*ol:first-letter li {color:red;}*/
ol:first-letter li {color:red;}
ol li {color:black;}