JSFiddle - React, Tailwind, and code Playground

HTML

<table class="myData">
<tr>
    <td class="lbl">
    Item 1:
    </td>
    <td>
    Amateur Team
    </td>

</tr>

<tr>
    <td class="lbl">
    Item 2:
    </td>
    <td>
    New School
    </td>
</tr>
<tr>
    <td class="lbl">
    Item 53:
    </td>
    <td>
    New School
    </td>
</tr>
</table>

JavaScript

var vals = {};
$(".myData td:nth-child(2)").each(function(i, e) {
    var txt = $(e).text();
    var val = vals[txt];
    vals[txt] = val == null ? 1 : val + 1;
})    
    
$(".myData td:nth-child(2)").each(function(i, e) {
    var txt = $(e).text();
    if(vals[txt] > 1) {
        $(e).css("color","red");
    }
})