Module palette 

What a theme document says about colour (docs/design-language.md, “Colour” and “Theming”).

A Palette is a temperature (one OKLCH hue and a chroma at or below NEUTRAL_MAX_CHROMA), a lightness ladder for the six surfaces, three ink tiers and four muted status tones. Emphasis decides how primary actions, selection and “on” states show. Tone sets the lightness and chroma of the presence palette, whose twelve hues never move. Everything else (crate::tokens::Colors) is derived from these numbers in one place, so a palette can only say what the design language lets it say.

Structs

InkLadder

OKLCH lightness of the three ink tiers, defined on the content surface.

Palette

The neutral material and its inks.

StatusTones

The four status tones. Their hues are STATUS_HUES.

SurfaceLadder

OKLCH lightness of every surface, 0 black to 1 white.

Tone

An OKLCH lightness and chroma at a hue the role fixes.

Enums

Emphasis

How primary actions, selection and “on” states show.

Constants

NEUTRAL_MAX_CHROMA

Ceiling on the neutral material’s chroma. The neutrals carry a temperature, never a colour.

PRESENCE_CHROMA

See PRESENCE_LIGHTNESS.

PRESENCE_LIGHTNESS

The presence palette’s usable band: bright enough to read as colour, never so loud that one participant shouts.

STATUS_HUES

Status hues, in OKLCH degrees: danger, warning, success, info. A theme moves their lightness and chroma, never their meaning.

STATUS_MAX_CHROMA

Ceiling on status chroma: danger, warning and success are muted.

TINTED_LIFT_CHROMA

Chroma of the selection lift under Emphasis::Tinted.