Can you add a band at the top of a box to a custom HTML box?

I was wondering if it was possible with HTML to put the dark band at the top of the boxes on you pack profile where titles are in custom HTML boxes? :O 

To help visualize it better: I want to replicate the part of the box that says "Lead Fallow" within it, whether it's capable of putting the text in there too in custom HTML form doesn't matter a whole lot since I mostly just want to stylistically match the rest of the page 

And here's the custom HTML boxes I currently have, that do not have the dark band at the top! 

<table class="table table-striped">

<tr>

<th class="top" colspan="5">

Title Bar

</th>

</tr>

<tr class="subheader font-weight-bold">

<td>

Text

</td>

<td>

Or

</td>

<td>

Images

</td>

<td class="text-right" colspan="2">

Here

</td>

</tr>