2026 10 07 chrome follows theme

B2b: page chrome follows the reading's theme — 2026-10-07

The third line of FND-008 and Q6 of the Consolidated Reader decisions: "The nine themes are the only colours a reader or a model sees. The Settings accent is removed and page chrome follows the reading's theme." B2a did the engine side; this is the rest.

What was decided

Question	Answer	Why
What goes	The Settings Accent row (four offered colourways of eleven), the stored chamberAccent and chamberAccentNamed, src/core/chamber-accent.js, the ten :root[data-accent] blocks, public/accent-boot.js with its <head> tag and cache rule, the Chamber's "Accent did not take." report	A second colour vocabulary beside the nine themes; nothing else read it
What a reading with a theme does to the page	While it is on screen, <html> takes the theme's accent (--color-accent, its RGB, --color-threshold); when it goes, the root returns to its ground state	So what is drawn outside the Chamber in a reading (Settings opened mid-reading, anything on the body) is in the reading's colours
What a reading without one does	Nothing: the ground state, Home's slate and ivory	B2a gave untitled readings no default theme; the default look's colour arrives with the looks
Home and the rooms	The ground state, always	The chrome follows a reading; Home has none on screen
Under a host (the ChatGPT card)	The Chamber does not touch the root	The host's frame paints its own theme on the root (LiveHost.paintEmbedTheme)
One reading replacing another	The root belongs to the reading that painted it last; the outgoing one, torn down after, cannot clear it	The router mounts the next Chamber before the last is disposed
The ink on an accent fill	Unchanged (--color-on-accent, dark)	Every theme accent holds it at 6.6:1 or better; a test holds that for any future theme
A reader who had chosen a colourway	It is dropped on the next load; nothing is migrated	There is nothing to map eleven sittings onto that the reader chose; their reading's theme now colours the page

Where it lives

src/core/chrome-theme.js (paint and clear, one owner), called from Chamber.applySessionColors and Chamber.destroy. Tests: src/core/chrome-theme.test.js, Chamber.settings-door.test.js "the page chrome follows the reading's theme", app.safety.test.js "keeps no accent of the reader's own", Settings.test.js "offers no accent". Rendered: a cobalt reading begun from Home sets the root's accent to the Chamber's (#58B8FF); Home's root is unpainted.

Not in this change, and RDR-026's: the "Show imagery through words" toggle and the ambient drone.

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Published from docs/product/discussions/2026-10-07-chrome-follows-theme.md. Edits made here are overwritten on the next push to main.