title: How to disable colors in Jest output
body: <p>When I run Jest in a terminal with a light background, its yellow output is totally unreadable.</p>
  
  <p>I have tried to find any options that allow me to customize the colors, or turn off output coloring altogether. I found plenty of suggestions with <code>--colors</code> to turn output colors <em>on</em> but that is the opposite of what I need.</p>
  
  <p>I am using Linux with an xterm window, with black text on a white background.</p>