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Blue, black, or red? What your USB port colors actually mean

Without clear labels, you can rely on colors, but remember that those aren't mandated by USB-IF, so they're not a guarantee.

What does a blue USB port mean? I learned the truth behind all the colors, and it's wild

Blue: Supporting USB 3.0 SuperSpeed technology and above, blue ports identify a device capable of fast data transfer: up to 5 Gbps (that's 5,000 Mbps) -- a significant jump from previous generations.