Legible

Legible is set in B612, the typeface Airbus commissioned for cockpit screens. Intactile DESIGN drew it in 2012. Its name comes from the Little Prince's asteroid, in honor of the aviator Antoine de Saint-Exupéry.

LegibleMade to be read at a glanceCodeAlertsColumn widths80 columns100 columns120 columns

Made to be read at a glance

B612 follows three rules:

Keep every letter true to its basic shape.
Make each letter look as unlike the others as possible.
Give shapes and spaces an even rhythm.

What is essential is invisible to the eye.
— Antoine de Saint-Exupéry, The Little Prince

Text can be bold, italic, highlighted, code or a link. Press Ctrl / (⌘ / on a Mac) to see this page as markdown.

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Code


x
KNOT_IN_KMH = 1.852  # exact, by definition


def to_kmh(knots: float) -> float:
    """Convert an airspeed in knots to kilometers per hour."""
    return round(knots * KNOT_IN_KMH, 1)


print(to_kmh(250))  # 463.0

\begin{matrix} (1) & km/h = knots \times 1.852 \end{matrix}

Alerts

Note
The fonts come with the theme. There is nothing else to install.

Tip
Wider windows fit longer lines of code.

Important
Copy the legible folder along with both CSS files.

Warning
Typora lists new themes only after a restart.

Caution
Renaming the legible folder breaks the fonts.

Column widths

Code blocks fit 80 columns. Windows 1400 px and wider fit 100, and 1800 px and wider fit 120. Each ruler stays on one line once the window is wide enough.

80 columns


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12345678901234567890123456789012345678901234567890123456789012345678901234567890

100 columns


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         1         2         3         4         5         6         7         8         9        10
1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890

120 columns


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         1         2         3         4         5         6         7         8         9        10        11        12
123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890

Convention	Limit	Fits on screen	Fits in an A4 PDF
PEP 8 (Python)	79	Every width	Yes
Prettier default	80	Every width	Yes
markdownlint MD013 default	80	Every width	Yes
Black (Python)	88	1400px and wider	No
rustfmt default	100	1400px and wider	No
Google Java Style	100	1400px and wider	No
JetBrains IDEs hard wrap	120	1800px and wider	No

B612 and Lato are free fonts.¹

1 Both are under the SIL Open Font License. The license texts are in the legible folder. ↩