app/assets/stylesheets/application.css

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/*
 * This is a manifest file that'll be compiled into application.css, which will include all the files
 * listed below.
 *
 * Any CSS and SCSS file within this directory, lib/assets/stylesheets, vendor/assets/stylesheets,
 * or vendor/assets/stylesheets of plugins, if any, can be referenced here using a relative path.
 *
 * You're free to add application-wide styles to this file and they'll appear at the bottom of the
 * compiled file so the styles you add here take precedence over styles defined in any styles
 * defined in the other CSS/SCSS files in this directory. It is generally better to create a new
 * file per style scope.
 *
 *= require_tree .
 *= require_self
 */

.navbar-default .navbar-nav > .active > a {
  background-image: linear-gradient(to bottom, #ff6600 0%, #ffd89a 100%);
}

.navbar-inverse {
  border-color: #ffd89a;
  background-image: linear-gradient(to bottom, #ffd89a 0%, #ffd89a 100%);
}

.navbar-inverse .navbar-nav > .active > a {
  background-image: linear-gradient(to bottom, #ff6600 0%, #ffbb00 100%);
}