I know exactly how you feel. I have dark hair, fair skin, and blue eyes, and the one thing I always get complimented on is my blue eyes! (stands out with the dark hair
I used to have BRIGHT blue eyes, like contact-looking fake eyes. After taking the Tetracycline, I now have very very light blue, almost greyish colored eyes. I still get alot of compliments on them because if anything I think they stand out more being so light against my dark hair, so the eye color change is actually not something I'm too terribly upset over.
I don't know anything about Trimox, you might try putting it into a search engine and seeing what you come up with. Like just go to Yahoo and type in Trimox in the search field and I'm sure you'll pull up a bunch of info. Good luck!