/**
 * Canonical CMYK process-ink colours — the **single source of truth** for how
 * the four process plates are tinted and swatched everywhere in the viewer: the
 * codex ink list, the in-browser PDF-scan ink list, the separation plate
 * composite, the densitometer readout, and the Pantone-gold process fallback.
 *
 * These tables used to be duplicated across modules and had drifted apart — the
 * plate composite tinted Cyan with `[0,183,235]` and the densitometer read
 * `#00b7eb` while the ink lists used `[0,174,239]`, so the plate, the side-panel
 * swatch, and the densitometer readout disagreed for the *same* ink. Derive
 * every consumer from this one table so they can never diverge again.
 *
 * Values are sRGB approximations of the coated process primaries.
 *
 * @public
 */
export declare const PROCESS_INK_RGB: Record<string, [number, number, number]>;
/**
 * Canonical RGB for a process-ink name — accepts full names (`"Cyan"`) and the
 * single-letter shorthands (`"C"`), case-insensitively. Returns `null` for
 * anything that isn't one of the four process inks, so callers fall back to a
 * spot swatch / hash colour.
 *
 * @public
 */
export declare function processInkRgb(name: string): [number, number, number] | null;
/** `#rrggbb` for an RGB triple (clamped to 0..255). */
export declare function rgbToHex([r, g, b]: [number, number, number]): string;
/**
 * Parse a `#rgb` / `#rrggbb` hex string to an sRGB triple, or `null` if it
 * isn't a valid hex colour. The inverse of {@link rgbToHex}; used to turn the
 * resolved swatch hex (which the inks panel shows) back into an RGB tint for
 * the separation plate composite, so plate and swatch share one colour source.
 */
export declare function hexToRgb(hex: string): [number, number, number] | null;
/**
 * Canonical `#rrggbb` for a process-ink name, or `null` if it isn't a process
 * ink (caller falls back to a spot swatch).
 *
 * @public
 */
export declare function processInkHex(name: string): string | null;
/** True iff `name` is one of the four process inks (full name or shorthand). */
export declare function isProcessInkName(name: string): boolean;
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