Best Answer Rob , 28 July 2013 - 05:36 PM
Firstly, if you read the option there is says Custom Class, not Custom Code. So adding CSS to a Custom Class field will not work, and will likely break things.
Custom Code is added under the Custom Code area. If you're using the Visual Editor, you'll see </> Custom Code as one of the menu items there. Click that. Paste your customized code into that area and save.
The Custom Class field in Typography is to add a new class, so you can customize text further.Go to the full post