The appearance and color identification of USB 2.0

According to the official specification released by the USB Developers Forum (USB-IF), the color markings on the USB interface correspond as follows: black represents USB 2.0, white represents USB 1.0, and blue represents USB 3.0 and subsequent high-speed protocols.

Apart from the above three officially designated colors, the remaining colors (such as green, purple, orange, red, etc.) are defined by manufacturers independently and are not included in a unified standard. Their meanings vary.
For example, purple interfaces are commonly seen in high-speed charging scenarios with a power of 40 watts or more.