in a preview post you mantion somethign like : when I apply current CSS code for our site but doesn’t have effect

.menu-style-default .navigation-wrap.navigation-color-scheme-dark .main-nav .item-level-0>a {
color: #00B0F6;
}
.menu-opener.color-scheme-light {
color: #00B0F6;
}
.menu-opener.color-scheme-light .burger-icon, .menu-opener.color-scheme-light .burger-icon:after, .menu-opener.color-scheme-light .burger-icon:before {
background-color: #00B0F6;
}