Hello Dr.Pepper Can,
You can define a class in your css stylesheet, and then apply that class to the textarea elements where you want to control the formatting in that particular way.
CSS
.myformat {
font-family:Verdana,Arial,Helvetica,san-serif;
font-size:14px;
color:#fff;
background-color:#000;
}
<textarea class="myformat">Generated content</textarea>
Adrian Gates
Sr.Web Developer