body {
 font-family: Arial, Verdana, Helvetica;
 background-color: black;}

h1 {
  text-align: center;
  color: white;}
h2 {
  color: white;}
h3 {
  color: white;}
h4 {
  color: white;}
p {
  color: white;}
a {
  color:darkgreen;}
<!-- a:visited {
  color:lightblue; -->

#pilne {
  color:red;
  }