Color

Neutral scale

Fixed — never rotates with --hue. Twelve stops; 750 and 900 are dark-mode-only (panel separation and the deepest code-background surface).

Token	Hex	Swatch
`--n-0`	`#f8fafc`
`--n-50`	`#f1f5f9`
`--n-100`	`#e2e8f0`
`--n-200`	`#cbd5e1`
`--n-300`	`#94a3b8`
`--n-400`	`#64748b`
`--n-500`	`#475569`
`--n-600`	`#334155`
`--n-700`	`#1e293b`
`--n-750`	`#16203a`
`--n-800`	`#0f172a`
`--n-900`	`#0b1120`

Semantic states

Fixed across every theme — success, warning, error, and info never rotate with --hue.

Token	Light	Dark
`--success`	`#0f9d63`	`#3ecf8e`
`--warning`	`#b45f06`	`#e0a84a`
`--error`	`#d13c30`	`#f0665a`
`--info`	`#1d6fbf`	`#5fa8e8`

Hue registry

Nine erisera products, one color wheel, zero collisions. The three existing closed products — nominos, nominos-core, the blog — each reserve their hue plus a ±20° buffer; every new OSS theme sits outside all buffers.

Product	Hue	Status
erisera (default) / matey	25°	shipped
nominos	199°	existing, closed
nominos-core	142°	existing, closed
blog	160°	existing, closed
objectify	70°	shipped
andbox	95°	shipped
mcp-query	250°	shipped
ecmanim	285°	shipped
clawser	340°	shipped

Blocked union: [122°, 219°]. Free arcs: (45°, 122°) and (219°, 365°). Adding a 7th OSS tool? Pick a hue in a free arc, ≥20° from every existing stop. The showcase has the full wheel diagram.

Accent formula

--accent: hsl(var(--hue) 95% 46%);        /* light */
--accent: hsl(var(--hue) 92% 58%);        /* dark */

Every other color derived from the accent — --accent-hover, --accent-soft, --accent-border, --shadow-accent — is computed from this one value, so a theme is a single number.