Is there a way to center or right justify text in a text field?

Here is what I have to put a field called Last Name in a coloured box and justify it to center.
Its a formula text field. The first part gives you whatever you want to put in the styling variable and the second part puts it together with the original field.

var text styling = "box-sizing: border-box;  font-size: 12pt; width:150px; text-align:center; padding-top: 15px; color:white;background-color:blue; position: relative; height: 50px;"; 

"<div style='" & $styling & "'>" & [Last Name] & "</div>

how do you type this into the formula box?

You just copy and paste that into a Rich text formula field type.