I have an HTML box on one of my reports that displays as follows:

I am trying to figure out how to rotate the text 270 degrees so that it is vertical. Below is the code that I have used.
<div align='center'><div class="appsText" style="padding:0px 0px 10px 0px;font-size:20px;color:#FFFFFF;background:#4f5b66"><b>Expense</b></br>
Any help is greatly appreciated.