Remove double color on Menu bar background.

In case you change the accent color of theme, the menu bar colors can look strange. 
You can fix it by removing the double color. In order to do that, Please enter below css in wp-admin/appearance/customise/additionalCSS box.

.main_menu .navbar {
    background: #(new color) !important;
}

.box_testi .title h4:before {
    border-color: transparent transparent transparent #(new color);
}
.main_menu .navbar .nav.navbar-nav.navbar-right li.request_btn a:before {
    border-color: transparent transparent #(new color) transparent;
}