title: Is it possible to change the colour of TTabSheet tabs
body: <p>I am running Lazarus 0.9.30.2.
  I have a TForm on which there is a TPageControl.  Within the TPageControl there is a series of TTabSheets (about 30 of them).  What I want to do is colour code the tabs, so the first 10 are Red, next 10 are Blue and the last 10 are Green.  I have seen code snippets on the intranet that change the tab sheet colour (including the tab itself) when you click on them and navigate to them (to highlight the active tab), but what I want to do is colour them as described above when the tab sheets are first loaded.  </p>
  
  <p>Is there are way to do this?</p>
  
  <p><img src="https://i.stack.imgur.com/JvMpP.jpg" alt="enter image description here"></p>