If you go to BD's website as I just did you will find what color top it should have based upon it's manufacture date. The blue generic top was for product manufactured before 2004 I believe...check their site.
Edit: I checked against Test Enth...sorry, their site says nothing about any other color for the Test Pro.
On another note, I checked a source with their authorized retailer checker...does that thing work cuz I'm about to place an order through this website if no mods wanna answer for a source check. Thanks!