Settings you can change
Open the accessibility panel with the in the header or press A. Your choices are saved on this device.
- Text size from 85% to 160%, plus line and letter spacing.
- Legible font: Atkinson Hyperlegible, designed for readers with low vision.
- High contrast mode and a strong focus ring.
- Colour-blind-safe plots using the Okabe–Ito palette.
- Underlined links.
- Reduce motion, which stops decorative animation and seasonal particles. We also follow your system’s reduced-motion setting.
- Sound is off by default and never plays on its own.
Keyboard
Everything can be reached with the keyboard. Press / or Ctrl K to search, [ and ] for the previous or next experiment, T for the day or night theme, and ? for the full list. A “Skip to content” link appears on the first Tab.
Screen readers
Pages use landmarks, headings and labelled controls. Search results and form messages are announced. Each interactive canvas has a text label, and every experiment also shows its key numbers as text readouts and tables.
Known limitations
Some visualisations, such as interference patterns and wave fields, are visual by nature. Their numerical results are always available as text, but the pictures themselves cannot be fully described. Mathematical formulas are rendered with KaTeX, which screen readers can read in most browsers.
Report a barrier
If something does not work for you, please tell us, including the page and the assistive technology you use. We aim to reply within five working days.
Last reviewed: October 2026.