title: Change nav item color depending on page
body: <p>I'm trying to change the color of the nav links depending on what page you are on. It is a fixed header. (<a href="http://tinyurl.com/kdgfrwn" rel="nofollow noreferrer">Here</a> is the link to my site).</p>
  
  <p>For example, on the front page it is black and easy to read - </p>
  
  <p><img src="https://i.stack.imgur.com/DFnAo.png" alt="enter image description here"></p>
  
  <p>But when you go to the site's posts the backgrounds are black, making the nav links impossible to read - </p>
  
  <p><img src="https://i.stack.imgur.com/x1iC2.png" alt="enter image description here"></p>
  
  <p>Is it possible to change the nav links based on the post's id?</p>