title: Dot at start and end in legend or color axis of highcharts?
body: <p>Would like to ask what is the dot is called at the start and after of legend bar?</p>
  
  <p><a href="https://i.stack.imgur.com/1svvK.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/1svvK.png" alt="enter image description here"></a></p>