How can I change the link color from a specific page?

I need to change the link color of a page. It also has a specific background, a different font and heading color and the CSS looks like this.

#collection-123 p { color: white; }
#collection-123 h2 { color: white; }
#collection-123 {
  background-image: url('myimage.jpg');
  background-repeat: no-repeat;
  background-position: top right;
}

I´m missing the link color but I can´t figure it out. Thanks