title: NSButton how to color the text
body: <p>on OSX I have an NSButton with a pretty dark image and unfortunately it is not possible to change the color using the attributes inspector. See picture the big black button, the text is <strong>Go</strong>.</p>
  
  <p><img src="https://i.stack.imgur.com/qfe8u.png" alt="enter image description here"></p>
  
  <p>Any clues for a possibility to change the text color? I looked in to the NSButton class but there is no method to do that. I´m aware that I could make the image with white font but that is not what I want to do.</p>
  
  <p>Greetings from Switzerland, Ronald Hofmann
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