Whatever I try to do, I can\'t modify the color of my links ( want to create a color rollover effect). They always stay the same default blue color with the underline effec
You missed some close-braces } that I fixed them by editing your question. Another Issue in your code is that should create css for A in this order:
}
A
a {} a:link {} a:visited {} a:hover {} a:focus {} a:active {}
to take effect. just change your A styles ordering and it'll work correctly.