Have you taken a serious look at the colour scheme your website uses? Are all parts of your web page visible to everyone?

Some times when we pick a colour scheme for our website we forget that there are people with poor vision and colour deficiencies. Even website visitors with "normal" vision can have difficulties reading a web page that has poor contrast between the colours used.

For a person with poor eyesight or colour blindness, certain colour combinations are hard to see. If there isn't enough contrast between the colours used, they just meld together for these visitors. This also happens for visitors with normal sight.

The colours you have picked may appear in enough contrast to you but they might not be for another person.