"Have a USB device near you? Look closely at the port -- do you see a color? It turns out that it actually means something. There's a standardized color scheme that communicates information about that device's capabilities. Mind blown? If you never noticed this, you're not alone. Most USB devices work fine on any compatible port, but they may not be optimized for optimal performance."
"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. Let's take a look at what they mean."
A standardized USB port color scheme communicates port generation, data-transfer speeds, and power-delivery features. Many USB devices function on compatible ports but may not achieve optimal performance when plugged into lower-capability ports. USB-A and USB-C connectors can differ in transfer speeds and power delivery even if they share the same physical shape. Two adjacent USB-C ports on the same laptop can offer different data and power capabilities. Seven major colors indicate capabilities: black denotes USB 2.0 (up to 480 Mbps), white denotes USB 1.x (up to 12 Mbps), yellow and orange indicate always-on power (orange adds USB 3.0 support), and blue indicates USB 3.0 SuperSpeed.
Read at ZDNET
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