title: How to invert colors in LESS
body: <p>Is there a particular color operation I'm not seeing where you can invert colors? I'm seeing lots of color methods but could not see a way to do this.</p>
  
  <p>reference: </p>
  
  <p><a href="http://lesscss.org/" rel="noreferrer">http://lesscss.org/</a></p>