That color is coming from the code on line 3478 in your css. You can override it by either pulling out the part that says – .epik-pink .site-header .sub-menu a:hover
and adding the color, or you can simply just add this to your css and add whatever color you want in it’s place –
.epik-pink .site-header .sub-menu a:hover {
color: #ffc5e1;
}
Where are the buttons that you’re referring to on your site located?