title: highcharts custombutton hover and press changing colors by default
body: <p>I am trying to create custom buttons in highcharts using 
  "chart.renderer.button" with a default color. however on hover or press the color seems to change by default... i donot want the color to change on hover and button press. Please let me know if there is a simple fix which can be done</p>
  
  <p>here is the fiddle: 
  <a href="http://jsfiddle.net/NxK39/81/" rel="nofollow">http://jsfiddle.net/NxK39/81/</a></p>
  
  <pre><code>    *var testbutton = chart.renderer.button('button1',0, 10)
          .attr({
              id: 'button1',
              fill:'#000000',
              height:20,
              width:40
          })
          .on('click', function () {
          alert("test1");
  
          })
          .css({
              color: '#FFFFFF',
              fontSize: '12px',
              fontWeight: 'bold'
          })
          .add();*
  </code></pre>