The London Underground is made up of 11 different lines, each with its own unique characteristics and history. Navigating the different lines and stations can be a challenge for newcomers, but understanding the language used to describe them can make your journey much easier. Each line is identified by a specific colour, which is used on maps, signs, and trains to help passengers distinguish between them. For example, the Central line is represented by the colour red, while the Piccadilly line is represented by dark blue.