I've just started with DNN and are loving it, but I want to play with the basic colours and layouts of some of the parts of site. I want to change the colour of the 'Login' link in the top right so that it is the same colour of the background, so it's there but you can't see it.

With the 4.9 default skin, add this to your portal.css or skin.css:

.user a:link, .user a:visited{

color:#E1E8ED;

}