Fact 1: the bands are needed, otherwise they wouldn't be there.
Fact 2: the bands could never have exactly the same colour as the case because the materials are completely different.
Fact 3: bands with almost the same colour as the case would be a) very ugly and b) a dishonest design, trying to hide necessary elements (and failing at that). No designer of Ive's calibre would ever do a thing like that.
Result: the current design. You may not like it, but it is honest and unapologetic.
HTC has the bands and they look far better than the iphones. Care to speak to that?