title: How to change the colour of ActionBar navigation tabs?
body: <p>I have an ActionBar in an app, and it has navigation tabs embedded in it (not TabHost!). By default the tabs show as dark grey, with a thin blue line under all the tabs, and a blue marker on the selected tab.</p>
  
  <p>Which styles do I override to change those colours?</p>
  
  <p><img src="https://i.stack.imgur.com/AjVlx.png" alt="enter image description here"></p>