Making Navigation Bars a Different Color on Each Page

I want my navigation bar colors to match the header I have on each page, but I don’t know how. Do I need to just add css or do I need conditional tags? I tried adding:

<?php
if (is_page(‘dirty-laundry’)){
echo ‘border-top-color: solid #000000;’;
}
?>

to the header.php but it’s not working. I’ve also tried adding:

.nav2-container .page-id-383 {
border-top-color: solid #000000;
}

to the stylesheet but that’s not working either. I don’t understand coding very well – so any help would be appreciated!

https://theapatheticprocrastinator.com/dirty-laundry/