Your PC's USB ports come in different colors, but only one is in the official USB spec: blue. The USB connector specification recommends blue (Pantone 300C) so you can tell USB 3 ports apart. Inside, USB 2 uses four pins and USB 3 adds five more, which takes it from 480 megabits to 5 gigabits a second.
Teal, red and yellow aren't in the spec. Brands pick those, and some use red or yellow for "always on" ports that charge your phone while the PC is off. So ignore the color and check the small icon next to the port, or your manual.
Sources:
USB-IF, USB 3.1 Legacy Cable and Connector Specification, §5.3.1.3–5.3.1.4: https://www.usb.org/document-library/usb-31-legacy-cable-and-connector-revision-10
USB-IF, USB 3.2 Specification: https://www.usb.org/document-library/usb-32-revision-11-june-2022
Lenovo, Always-on connector: https://download.lenovo.com/pccbbs/pubs/slim5_14q8x9/ug/html_en/en/brief_intro_connector_always-on.html
Did you think the colors were official? Tell me in the comments.
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