Version 0.9.2

Data Design Language

This site presents the underlying principles, design system and chart components of the Data Design Language for

The WHO Data Design Language (DDL) provides building blocks and techniques for creating rich information experiences for everyone.

Our objective is to ensure that a user's experience of our data presentation is as informative, equitable, accessible and delightful as possible.

Deliberately not designed as a rule set, but rather a toolbox, the DDL includes a chart library, design guidelines, colour and typographic style specifications with usability guidance for internationalization (i18n) and accessibility (a11y), all reflecting our data design principles — ready to use and apply in a variety of settings and environments.


Core Values


Data presentations are tailored to information needs, understandable and approachable.


They reveal uncertainty, precision, provenance, and coverage of the data.


We create rich data experiences for everyone, through accessible, international, adaptable, and participatory approaches to data visualization.


Data can be consumed in a variety of channels and sizes, through robust and lean technological solutions.


Our data design principles present guiding standards for how we approach the design of data presentation at WHO.

More on principles
Teaser image for design system section, showing two examples for data visualizations

Design system

A consistent, expressive and accessible design vocabulary for the presentation of health data at WHO.

More on the design system
Teaser image for Charts section, showing a variety of different chart types


A careful curated set of data visualization components makes it easy to use the design language in practice.

More on charts