"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."
There is a standardized color scheme for USB ports that signals generation, maximum data transfer speeds, and power-delivery behavior. Many USB devices will function in any compatible port but may not achieve optimal performance if plugged into a lower-generation or lower-power port. Colors commonly map to specific standards: white for USB 1.x (up to 12 Mbps), black for USB 2.0 (up to 480 Mbps), yellow for always-on USB 2.0/3.0 power, and orange as an always-on port with USB 3.0 support. USB-A and USB-C ports can differ in capabilities even when placed side by side.
Read at ZDNET
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