Long before “brand guidelines” existed, the London Underground was already running one of the most disciplined visual systems on earth.

The bar-and-circle roundel first appeared on platforms in 1908 — a coloured disc behind a station name, to help it stand out among the adverts — and was refined into its familiar ring-and-bar form (and registered as a trademark) by 1917, with Edward Johnston reworking its proportions. Paired with Johnston’s typeface, generous grids and a strict colour system, it made a sprawling, privately-tangled transit network feel like one calm, coherent institution decades before anyone used the word “identity.” It is, plausibly, the world’s first modern corporate brand — and, more than a century on, still one of the best.

In 1916, a calligrapher was asked to draw an alphabet for a railway — and quietly invented the modern corporate typeface.

Frank Pick commissioned Edward Johnston, and in 1916 he delivered Johnston — a humanist sans-serif with near-perfect circular letters and a signature diamond-shaped dot on the “i”. It was one of the first typefaces ever designed specifically for a corporate identity, and its influence is enormous: Johnston’s assistant, Eric Gill, took its ideas and drew Gill Sans in 1928. The type was redrawn as New Johnston in the 1970s and again as Johnston100 (by Monotype) for the 2016 centenary. A century of continuous use from a single 1916 alphabet — that’s the definition of a timeless system.

Two “corporate” colours anchor the identity — and a rainbow of line colours does the wayfinding. Click a swatch to copy the hex.

TfL’s official standard names Corporate Blue (#0019A8, Pantone 072) and Corporate Red (#E1251B, Pantone 485) — precise values, matched to Pantone rather than eyeballed. Beyond them sits one of the great functional colour systems in the world: each Tube line gets its own dedicated colour, so a rider reads the network by hue before they read a single word. It’s the same insight as the New York subway’s bullets — encode the map’s logic in colour — executed with characteristic British precision. Copy the line colours below.

The Tube’s most famous piece of design is a beautiful lie — and that’s exactly why it works.

In 1931, an engineering draughtsman named Harry Beck sketched the Underground not as a geographic map but as a diagram, borrowing the visual language of the electrical circuits he drew at work: only horizontal, vertical and 45-degree lines, even spacing between stations, and the real geography deliberately distorted. First published in 1933, it was a radical idea — underground, you don’t care where a station really is, only which line to take and where to change. Riders loved it, and it became the template for transit maps worldwide. Beck’s lesson is the deepest one in information design: to be truly useful, a picture often has to abandon literal accuracy in favour of clarity.

Behind the roundel, the type and the map stood one administrator with an unusually complete idea of design.

The Underground’s coherence was not an accident of good taste; it was commissioned. Frank Pick, who rose to lead London Transport, treated design as a management responsibility rather than decoration. He hired Edward Johnston for the typeface, championed the standardised roundel, and insisted that everything from tiling to ticket halls to signage obey one visual discipline. Pick understood, decades early, that a transit network is experienced as a single continuous thing — and that consistency in the small parts is what makes the whole feel trustworthy. He is often described as one of the first true design patrons of the modern corporation, a manager who bought good design deliberately rather than by luck.

His other great legacy is the poster programme. Pick commissioned leading artists — among them Edward McKnight Kauffer — to make bold, modern posters encouraging Londoners to travel, turning station walls into a rolling public gallery and the Underground into a genuine patron of the avant-garde. It was advertising, but it was also a statement that public transport deserved beautiful things. That combination — rigorous wayfinding underneath, expressive art on top — is why the system still reads as generous rather than merely efficient. The lesson endures: great identities need a champion with the authority to hold the line, and the taste to know when to let creativity off it. Without a Pick, there is no Johnston, no disciplined roundel, and very possibly no Beck map either.

Keep the Underground’s design on hand — save it to a board in the Made Good inspiration library.