"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."
USB ports use a standardized color scheme to indicate generation, data transfer speeds, and power delivery characteristics. Universal-looking USB-A and USB-C ports can differ widely in transfer speed, power transfer, and generation despite identical connectors. Adjacent USB-C ports on the same laptop can offer different capabilities for data and power. There are seven major colors that communicate what kind of performance to expect. Common color meanings include black for USB 2.0 (up to 480 Mbps), white for USB 1.x (up to 12 Mbps), yellow/orange for always-on power with USB 2.0/3.0 support, and blue for USB 3.0 SuperSpeed.
Read at ZDNET
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