title: Sparklines stacked bar color options only allow two color variations?
body: <p>I'm using the sparkline function in Google Spreadsheets. Here is an example of some data:</p>
  
  <pre><code>Feb-2015    MTD Actual  MTD Budget  Budget
  Campaign 1  $41.32       $13.71   $96.00
  </code></pre>
  
  <p>I'd like to create a stacked bar chart sparkline as per the documentation <a href="https://support.google.com/docs/answer/3093289?hl=en" rel="nofollow noreferrer">here</a>.</p>
  
  <pre><code>=sparkline(D9:F9,{
      "charttype","bar";
      "color1","blue";
      "color2","yellow";
      "color3","red"})
  </code></pre>
  
  <p>D9:F9 corresponds to $41.42: $96</p>
  
  <p>Here is what the result looks like:
  <img src="https://i.stack.imgur.com/z6v5q.png" alt="enter image description here"></p>
  
  <p>I had expected a segment to be red (color3). But the sparkline only seems to customize 2 colors. Can't see anything in the documentation about this. Is this a bug? Or am I misunderstanding something?</p>
  
  <p>If it's the case that I can only edit 2 colors using this function, I don't suppose it's possible to edit the functionality using Google-Apps-Script?</p>