title: How do I implement solid colours for zone boundaries in Highcharts?
body: <p>I have set up a line chart in Highcharts with a different colour to indicate values reaching unacceptably high values (95% or above).</p>
  
  <p>To achieve this, I added zones to my series configuration, as follows:</p>
  
  <pre><code>zones: [{
      value: 95,
      color: 'lightblue'
  }, {
      color: 'red'
  }]
  </code></pre>
  
  <p>One blue zone encompasses values up to 95, and another red zone shows higher values.</p>
  
  <p>It seems that when values come close to 95, the line starts to turn red, meaning that on a chart where the line approaches but never hits 95%, the line shows (partially) red.</p>
  
  <p>I would like to prevent this, and only turn the line red if the value hits 95%. Is there a way to do this?</p>
  
  <p><a href="http://jsfiddle.net/o53pmtLo/" rel="nofollow">Here</a> is a demo showing the problem. Thanks!</p>