What does the connector colour on the USB ports mean?

USB - History & Timeline usb slot types CentIoT - 5PCS DC Power Supply Jack Socket Male Connector - Round Panel Chasis Mount 12V · Kingwin Powered USB Hub w 1 USB-C Port, SD Card Reader usb a slot CentIoT - 5PCS DC Power Supply Jack Socket Male Connector - Round Panel Chasis Mount 12V · Kingwin Powered USB Hub w 1 USB-C Port, SD Card Reader

usb 30 slot This is an animated video that describes the different kinds of USB ports