Black vs blue: why are my USB ports colored on the inside?
Not all USB ports are made equal - here's why some are black, some are blue, and others are even teal colored.
Hackaday2y
Is Your Device Actually USB 3.0, Or Is The Connector Just Blue?
Faced with two similar choices of discount HDMI capture device, [Majenko] opted for the fancier-looking USB 3.0 version over the cheaper USB 2.0 version, reasoning that the higher bandwidth ...