title: Magento, different background color for group of rows on backend grid
body: <p>On a backend admin page with a grid I need to change the background color for groups of rows. Not alternate color row by row as default but coloring groups according to a known column value.</p>
  
  <p>I was looking into this SO question: <a href="https://stackoverflow.com/q/6569386/1297603">Approach on changing row color on orders grid in admin</a> and other similar pages. But can't reproduce what I need as this question refers to a value in a column that will be repeated.</p>
  
  <p>I need to either use different colors for different groups or at least use alternate colors of those groups.</p>
  
  <p>Maybe something like this:</p>
  
  <p><img src="https://i.stack.imgur.com/A2BTm.png" alt="enter image description here"></p>