Style member area confirmation page

Anyone know how to customize the member area confirmed page colors? Trying the following in custom CSS but not seeing any changes. 

/* Member confirmation page */
body#confirmed-page {
  background-color: #ffffff !important;
  color: #1C1E23 !important;
}
body#confirmed-page h1 {
  color: #1C1E23 !important;  
}
body#confirmed-page h2 {
  color: #1C1E23 !important;  
}
#confirmed-page .header-nav-item a {
  color: #1C1E23 !important;  
}
#confirmed-page .header-nav-folder-content {
  background-color: #ffffff !important;
  color: #1C1E23 !important;
}
#confirmed-page .header-nav-folder-item a {
  color: #1C1E23 !important;  
}

Can you share link to page? We can check easier