@michalahulme: Sorry about the lost and I will try to answer it.
1. Not sure about the menu much. So, can you try to change the background color and color as per your need and then add it in “Appearance => Theme Options => Custom CSS” box.
#secondary-menu ul.menu li:hover > a,
#secondary-menu ul.menu a:focus,
#secondary-menu .menu .current-menu-item > a,
#secondary-menu .menu .current-menu-ancestor > a,
#secondary-menu .menu .current_page_item > a,
#secondary-menu .menu .current_page_ancestor > a {
background-color: #1b5F7d;
color: #fff;
}
2. For slider content, change the background color and color as per your need and then add it in “Appearance => Theme Options => Custom CSS” box.
#main-slider .entry-container {
background: none #21759b;
color: #fff;
}
#main-slider .entry-container:hover {
background: none #21759b;
color: #fff;
}
3. For footer sidebar, change the color as per your need and then add it in “Appearance => Theme Options => Custom CSS” box.
#footer-sidebar {
background-color: #21759b;
}