Hello,

You should install Firebug on Firefox and inspect the elements to get a clearer picture of the DOM structure. You can customize it by adding your own set of css tools,

body div#fd.es .es-toolbar .navbar-inner

{

    background: #000 !important;

}

In which css file I should add those lines?

You need to add it into your template's css file. As I don't have the URL to your site, I do not know which template are you currently running on

Im using ja purity III
http://incircl.net/

Hello,

I am really sorry for the delay of this reply as it is a weekend for us here. You can try adding them into /templates/system/css/system.css because it looks like JA Purity is also utilizing less for their css structure.

It works, but it changed only main bar color, not everything

Hello,

You need to add your own css codes. The codes I provided above is just a sample You need to install Firebug and inspect the element and copy the css selectors and add the css codes into your template's css file

Okay, Ill try, thanks for helping!

You are most welcome