maybe try:
$blackRows.each(function(){
var rect = this.getBoundingClientRect();
var style = this.currentStyle || window.getComputedStyle(this);
var marginBottom = parseInt(style.marginBottom, 0)
if(rect.top - offset < 0 && rect.bottom + marginBottom - offset > 0){
$nav.addClass("white");
jQuery(".sitetitle img").attr("src", "https://alicjaboss.com/wp-content/uploads/2022/06/logo_hell.png");
return false;
}else{
$nav.removeClass("white");
jQuery(".sitetitle img").attr("src", "https://alicjaboss.com/wp-content/uploads/2022/06/logo_dark.png");
}
});
