We are getting a hummer limo for our wedding...?

Is it customary to go with a white limo? Or do you all think a black one would be ok as well? the reason I ask is because the limo company are offering a black one to us that will accomodate our whole wedding party at teh same price that a smaller one white hummer would cost. I really want the white one, however it wil not accomodate our whole wedding party> Im nervous about having a black hummer in front of our church(it reminds me of a nite out to hit out the clubs) advise please!