Something's Wonky [link color]

I was trying to change the appearance of the purple link in my signature, but no matter what color I try and change it to, they all show as dark blue. I tried, red, green, yellow, etc, and they're all the same.

I toggled the view to see the code and it said the color I'd selected, but it still showed as blue.

I took the link coding off and typed the "My Bloggish Blog Thing" part, without the url, and I could change the color fine.

No, purple is the color I picked for my sig-line when I first put it up. If it was just a matter of turning that color when clicked, the other colors would be purple, not dark blue. Two days ago, I tried to alter it with a few other links in the sig-line, and it worked then, but I didn't want to keep so many links because they took more space than I anticipated. I left it alone after the preview, and now I can't change it again.