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Light, Dark or System
Formatting opens the help over the editor, and its last row is the
Theme: Light, Dark or System. System, the default, follows your
computer’s own light or dark mode, and changes when it does. What you pick
is remembered in this browser, and a window already open takes it up too.
The page in the preview follows: in Dark it’s drawn on dark paper, light
ink, with its code, tables, alerts, cards and puzzles in their dark colours,
and a Mermaid diagram in Mermaid’s dark theme.
- A page’s own
background: (The page) wins over the theme. A
light one stays light paper with dark ink in Dark, and a dark one stays
dark in Light.
- Slides follow too, on the stage and in the speaker view. The speaker view
itself is dark, for a darkened room, unless you pick Light.
- What’s saved or printed (Export and print) is light,
whatever the theme, unless its own background is dark; on paper it’s
always light.
More contrast
When your computer asks for more contrast (macOS: Increase contrast;
Windows and others: prefers-contrast: more), reader and the page both
take it up, in Light and in Dark:
- Text is 7:1 or better against what it sits on, the softer greys and the
colours of code, cards, alerts and badges too.
- Rules and borders are darker, 3:1 or better.
- What a faint tint showed is shown another way too: the open file and the
place picked in Go to are outlined, a done task isn’t faded, and a
compare’s words are underlined where they’re added and struck through
where they’re gone.
The system’s own colours
With Windows’ contrast themes, or anything else that sets
forced-colors: active, your system’s colours replace reader’s, and the
tints and shadows go. What they said is kept:
- The open file, the outline entry you’re at, a picked row, the page
showing, the step being worked on, a lit line of code and a puzzle’s
cursor are outlined in the system’s highlight colour.
- A highlighter’s wash is the system’s own mark colour.
- Chips and badges (a reviewer, a numbered step, a done card, an answer)
stay filled, in the system’s colours.
- Puzzles and the lines from a mark to its asides are drawn in the system’s
colours too.