Choose your colors make sure that they are not the same colors. For example don't choose black background and black text or links. The colors have to be opposite each other dark on light or light colors on dark colors. So if you cannot see the text on your page all what you have to is change the text colors or the background color.
The best way is to use the safe colors when you start the page. In this case you don’t have to guess if the text or links are showing or not.