Themes

Optional fence field theme: picks a named look. Omitted means folio. Unknown is E_UNKNOWN_THEME plus table fallback — never a silent swap.

type: bar
theme: folio
title: Feb led Q3 at 180
x: month
y: revenue

month,revenue
Jan,120
Feb,180
Mar,150

Allowed ids: folio · highcharts · shadcn · docs · ant · recharts.

Theme vs palette

A theme is a grammar: mark form, axes, legend policy, typeface, plot chrome, padding. Hex is one column inside that grammar — not the product.

Palette is a second axis (colors only): optional fence palette: with ink · porcelain · warm · cool · vivid. Omit → theme pack default colors. Unknown → E_UNKNOWN_PALETTE + table. Play and Examples detail keep two controls (Theme + Color) — never one merged dropdown.

Hex tables live in docs/themes.md / packages/themes/palettes.ts. Do not invent hex lists on this page.

Site light/dark mode is chrome only — unrelated to fence theme=.

Packs on disk

Token packs live in packages/themes/<id>/theme.ts, resolved by packages/themes/registry.ts. @markvis/render-svg imports the registry only. No vendor chart runtimes. Site marketing figures stay folio unless a theme control is on.

id	B&W tell (short)
folio	Open sheet, soft bar tops, end-labels for few series
highcharts	Hard plot box, axis titles, square bars, legend
shadcn	Soft card frame, rounded bars, quiet grid, legend
docs	Tight inset, thin stroke, bottom legend, no end-labels
ant	Big title air, narrow columns, technical axes
recharts	XY grid, bottom legend, stroked scatter rings

How to add a pack

See Contributing themes. Same ThemeTokens keys as folio, register in the registry and in @markvis/ir THEMES, keep snapshots green.