Solution for this topic

To achieve this instead of above shared CSS code please use the below custom CSS code.

#page-container .sh-header .sh-nav > li.menu-item > a{
        color: #fff !important;
}

#page-container .sh-header.sh-sticky-header-active .sh-nav > li.menu-item > a,
#page-container .sh-header .sh-nav > li.menu-item > a:hover{
        color: #ec176e !important;
}

#page-container .sh-header.sh-sticky-header-active .sh-nav > li.menu-item > a:hover{
    color: #000 !important;
}