I'll try to look into that blurriness. How many pixels does the picture you are using have?
Did you mean an older marker generator, or a saved .svg file? If, you are using Internet Explorer, is this version better Version 7 for IE ?
Do you mean numbers like this #bea940 (Outcasts) or this #d5742a (Ten Thunder)? I don't have Internet Explorer at home, so I would have to check it at work.
Edit: I couldn't recreate the blurriness on 20mm markers, neither with IE nor with Firefox. Maybe you could send me the actual picture you are using by PM or email?