Here’s an example with a header and content. Put it in a template column and replace the tags with your column values. Then use that template column in a rich text component.
<div style="background-color:#daede2;padding:10px;border-radius: 10px;">
<h4>{Header}</h4>
</p>
{Content}
</div>
You may prefer to use font and font color tags to alter the text size and color as opposed to header tags. It’s up to you how you want it to look.