parallax.html

<style>
body {
    margin: 0;
    background: #e6e6e6;
}

header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: -1;
    height: 500px;
    line-height: 500px;
    text-align: center;
    margin: 0; padding: 0;
}
.wrapper-parallax {
    margin-top: 500px;

}
.content {
    position: relative;
    z-index: 1;
    background: white;
    min-height: 1800px;
}
</style>
<div class="wrapper-parallax">
    <header>
        <h1 class="logo">Header</h1>
    </header>

    <div class="content">
        <h1>Content</h1>
    </div>
</div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script>
$(window).scroll(function(){
    var fromTop = $(window).scrollTop();
    $(".logo").css('margin', '-' + (100 - fromTop) + 'px 0px 0px 0px');
});
</script>