How to put the first different header in DomPDF

I'm using the following html (Print Header Footer Example) as a template, but I'd like to put the first different header.

My CSS doesn't work

I create a a inside

I added the CSS below:

.headerc {
  background-color: rgb(4, 255, 0);
}

.headerc:first {
   background-color: blue;
}

But all a gets .headerc, I'd like the first of a to receive the stylization of the .headerc:first

Solution

I guess :first is not a valid pseudo class selector as used in your code

And to show or hide elements of a printed page, you can use @media print