How to change hyperlink colour when previous solutions won't work....

I have a problem on my site where a lot of the links are not the correct colour, and with different colour backgrounds they become invisible. I have posted variations of this question before, however previous suggestions that have worked on other pages are not working on this one:

http://drgeraldlewis.com/registration-complete/

There is a link on the word 'here' after 'contact us' in the validation box, which is not showing unless hovered over, however I really need it to be visible all the time.

Any suggestions much appreciated.
Thanks :slight_smile: