How to access my custom fonts via AS3?

I have a custom fonts in my library:

I'd like to be able to reference this, so I can apply it's font to a newly created text field, like this:

var txtFormat:TextFormat = new TextFormat();
var myFont:Font = new $ColdDefaultFont();
txtFormat.font = myFont.fontName;

MyTextField = new TextField();
MyTextField.defaultTextFormat = txtFormat;

However I can't seem to instance my custom font from the libary, so that I can check which font it's using.

Does anyone know how?