What is the trick for getting the strokeColor property to work?

What is the trick to getting the strokeColor property to work?

I am working on a script to programatically build a button on a page and I want to set the border color to blue. I cannot get it to work. I have even tried the line of code below on a field that allready exists but has a transparent border.

getField("Btn.ShowExample").strokeColor = color,blue;

Here is the result when I run the line of code above in the console.

InvalidSetError: Set not possible, invalid or unknown.
Field.strokeColor:1:Console undefined:Exec

I have been looking through the documentation and cannot find anything to let me know what else I need to do. Does anyone have an idea of what I need to do to make this work?