title: trackbar appearance with backcolor
body: <p><img src="https://i.stack.imgur.com/yUzkU.png" alt="enter image description here"></p>
  
  <p>How to make a trackbar like this picture? If its unachiveable with the trackbar, what other methods are there to achieve something similar?</p>
  
  <p>I would have a sql populate the values too.. any suggestion on how to approach this?
  An example would be for PH reading we have a set of values to be maximum and minimum, the slider would be the current value of the object. The green zone is the first warning values, the yellow is the danger values.</p>