"Despite the fact that they share a universal port shape, all USB-A and USB-C devices are not created equal, with potentially very different transfer speeds, power transfer, and generations on similar devices. Even two USB-C ports right next to each other on the same laptop could have very different capabilities when it comes to data transfer speed and power delivery."
"Black: Denoting USB 2.0, this is the second most common you'll see on devices of all types, supporting speeds of up to 480 Mbps. White: These are first-generation devices -- USB 1.x -- with the slowest potential transfer speeds that don't typically exceed 12 Mbps. They're also some of the most common, found on devices that don't require data transfer or high power delivery."
USB port colors indicate device generation and signal expected data transfer speeds and power capabilities. USB-A and USB-C ports share a universal shape but can differ in transfer speed, power transfer, and supported generations even on the same device. Some ports are "always on" and can supply power when the host is off. Common color conventions include black for USB 2.0 (up to 480 Mbps), white for USB 1.x (up to 12 Mbps), yellow for always-on USB 2.0 or 3.0, orange as always-on with USB 3.0 support, and blue for USB 3.0 SuperSpeed.
Read at ZDNET
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