this post was submitted on 09 Sep 2024
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It's cool, the colors are just for aesthetics. Internally they're all connected to the same USB controller chip anyway.
/s probably
Edit: it was a joke. I know blue means 3.
If they're following the standard, which they often do but sometimes don't, white indicates 2.0 and blue indicates 3.0+. I think there are more but I don't remember the other colours.
Blue is a convention to indicate USB 3. Of course, not everyone actually implements that, and USB-C ports don't, as far as I know, do that at all, just USB-A.
My current desktop does both -- the case has USB ports on the top that come off a USB header from the motherboard, which have a simple number "3.0" pointing at its USB-A ports in front, but uses black plastic for them. The motherboard's USB connectors in back use the "blue plastic" convention on its USB-A 3 ports, and black plastic on its USB-A 2 ports. The motherboard also labels the USB 3 ports by having a text label reading "USB 3.2", which isn't listed on OP's set of symbols, and puts symbols on them.