--- title: "USB, those colors are not there by chance | Luca Carbone" description: "It happens to everyone: you plug a USB flash drive into your PC and notice that the port is blue. Or maybe white. Or even black. Have you ever wondered why…" lang: it json-ld: | [ { "@context": "https://schema.org", "@type": "Person", "name": "Luca Carbone", "url": "https://www.lucacarbone.ch", "image": "https://www.lucacarbone.ch/assets/luca-carbone-C0WgL-tV.jpeg", "sameAs": [ "https://instagram.com/lucacarbone.ch" ], "jobTitle": "Giornalista Tech e Consulente AI", "description": "Luca Carbone è un giornalista digitale e consulente AI attivo in Ticino, autore della rubrica settimanale DigiTIamo su Il Mattino della Domenica.", "knowsAbout": [ "intelligenza artificiale", "telefonia business", "giornalismo digitale", "innovazione tecnologica", "Ticino" ], "worksFor": { "@type": "Organization", "name": "Il Mattino della Domenica" }, "address": { "@type": "PostalAddress", "addressRegion": "Ticino", "addressCountry": "CH" } }, { "@context": "https://schema.org", "@type": "WebSite", "name": "Luca Carbone", "url": "https://www.lucacarbone.ch", "description": "Sito ufficiale di Luca Carbone. Giornalismo digitale, analisi tecnologica e rubrica DigiTIamo dal Ticino.", "inLanguage": "it-CH", "author": { "@type": "Person", "name": "Luca Carbone" } }, { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://www.lucacarbone.ch" }, { "@type": "ListItem", "position": 2, "name": "Blog", "item": "https://www.lucacarbone.ch/en/blog" }, { "@type": "ListItem", "position": 3, "name": "USB, those colors are not there by chance", "item": "https://www.lucacarbone.ch/en/education/colori-usb" } ] }, { "@context": "https://schema.org", "@type": "Article", "headline": "USB, those colors are not there by chance", "description": "It happens to everyone: you plug a USB flash drive into your PC and notice that the port is blue. Or maybe white. Or even black. Have you ever wondered why…", "image": "https://wdulmpxygmloyswixhxp.supabase.co/storage/v1/object/public/article-images/articles/colori-usb-1769898937419.png", "datePublished": "2025-12-07T01:16:17+00:00", "dateModified": "2026-01-31T22:35:37.622606+00:00", "author": { "@type": "Person", "name": "Luca Carbone", "url": "https://www.lucacarbone.ch", "sameAs": [ "https://www.linkedin.com/in/lucacarbone", "https://instagram.com/lucacarbone.ch" ] }, "publisher": { "@type": "Person", "name": "Luca Carbone", "logo": { "@type": "ImageObject", "url": "https://www.lucacarbone.ch/favicon.png" } }, "mainEntityOfPage": { "@type": "WebPage", "@id": "https://www.lucacarbone.ch/en/education/colori-usb" } } ] --- [ LC://\_ LucaCarbone ](/) [Home ](/en)[Blog ](/en/blog)[About ](/en/about)[AI X Business ](/en/ai-per-aziende)[Services ](/en/services)[Contact ](/en/contact) [IT ](/digitiamo/colori-usb) [Back to blog](/en/blog) [ Educazione ](/en/blog?category=Educazione)Dec 7, 2025 2 min read # USB, those colors are not there by chance It happens to everyone: you plug a USB flash drive into your PC and notice that the port is blue. Or maybe white. Or even black. Have you ever wondered why USB ports aren't all the same? Spoiler: it’s not for looks. Every color tells a story of speed, technology, and compatibility. And in a world where every second \[…\] ![USB, those colors are not there by chance](https://wdulmpxygmloyswixhxp.supabase.co/storage/v1/object/public/article-images/articles/colori-usb-1769898937419.png) It happens to everyone: you plug a USB flash drive into your PC and notice the port is blue. Or maybe white. Or even black. Have you ever wondered **why USB ports aren't all the same?** Spoiler: **it's not for aesthetics**. Each color tells **a story of speed, technology, and compatibility.** And in a world where every second counts, knowing **where to plug in the right connector** can make a big difference. #### Black, white, blue… and now red too Let's start with the classics. If you have a computer from a few years ago, you will most likely find USB ports with: - **Black color**: this is **USB 2.0**, the "standard" for many years. Maximum speed: 480 Mbps. It's fine for mice, keyboards, and flash drives, but it's not ideal for external drives or large video files. - **Blue color**: welcome to **USB 3.0 (or 3.1 Gen 1)**. Speeds up to 5 Gbps, which is **10 times faster** than 2.0. If you are connecting an external hard drive, **this is the right port**. - **White color**: sometimes used for **USB 1.0/1.1**, but it's rare now. It was incredibly slow (12 Mbps) and has practically disappeared. Then there are the **"newer and more mysterious"** colors: - **Red or yellow**: in many cases, these indicate **USB ports that remain powered even when the computer is turned off**. Useful for charging your phone at night, even when the PC is in standby mode. - **Teal**: USB 3.1 Gen 2, even faster (up to 10 Gbps). - **Green, orange, gray…**: these are often manufacturer customizations. In these cases, the color isn't a standard, but **it can indicate special functions** (e.g., fast charging, transfer priority, etc.). #### And what about USB-C ports? Great question. With the arrival of **USB-C**, the color **is no longer visible** on the port. Therefore, **you can no longer rely on sight alone**: you need to check the computer manual or find out by trial and error. A USB-C port can support: - USB 3.2 - Thunderbolt 3 or 4 - Charging only, without data - 4K or 8K video (DisplayPort) - Or… everything at once In short, **the shape is the same, but the functionalities can vary greatly**. 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