Link colour in CSS: .invalid a

Hi all,

For me, these two colours do not contrast well enough in:

http://validator.w3.org/results.css

Here are the definitions:

.invalid {
  background:  #880531;
[...]
}

.invalid a {
  color: blue;
}

I recommend "color: blue;" be given a background, such as: "background-color: silver;" or some other way to add contrast. (lighter text for example)

Regards,
Douglas