JSFiddle - React, Tailwind, and code Playground

HTML

<table id="greentable" >
    <tr>
       <td>UserName</td>
        <td class="style1"> <input name="ctl00$MainContent$txtUserName" type="text" id="MainContent_txtUserName" /> 
            <span id="MainContent_RequiredFieldValidator1" style="display:none;"></span>
        </td>

CSS

#greentable
{
border:1px solid green;
background-color: green;
}
#greenth
{
background-color:green;
color:white;
}