title: Change all (background, sidebar, components, etc) the background color of the dark theme provided by NGX-ADMIN
body: <p>I have started using the <a href="https://github.com/akveo/ngx-admin/" rel="nofollow noreferrer">ngx-admin</a> template and it is really great. </p>
  
  <p>However, I want to change one of the templates provided, the dark one. All I want to do is change the main theme colour (which is some shade of blue) to a different dark colour like (black, etc).</p>
  
  <p>Can that be done, if yes, please tell me how?</p>
  
  <p>I have tried reading the docs, but either I am searching it right or it cannot be done.</p>
  
  <p>I am using any kind of template for the first time and any help would be hugely appreciated.</p>