title: New warning in Chrome through jQuery
body: <p>A new warning message suddenly appeared in Chrome developer tools (probably after an update) on a larger CSS+jQuery project of mine and I can't figure out what the problem might be:</p>
  
  <blockquote>
    <p>The specified value '!' does not conform to the required format. The format is '#rrggbb' where rr, gg, bb are two-digit hexadecimal numbers.</p>
  </blockquote>
  
  <p>I've checked everywhere and I'm not using any '!' when specifying colors.</p>
  
  <p>I'm using jQuery 2.1.0 version.</p>