/**
 * WHO A MARK IS OF, and the hue that follows from it.
 *
 * PRIVATE, and that is the point: a hue a call site chooses is a category the
 * reader cannot act on, so the package publishes no way to pick one. An app that
 * wanted a particular colour is stating a fact, and a fact is a `Status` or a
 * `Chip`.
 */
/**
 * THE EIGHT HUES A MARK IS DEALT BY WHOSE IT IS.
 *
 * A mark's colour is DATA — who — and it is `constitution.md` §8's one exception
 * for that reason: a register of twenty people drawn in one tint is told apart by
 * two letters each. Eight rather than the palette's twenty-two: they are the
 * families that stay apart in HUE, and `identity_hue.test.ts` measures all 28
 * pairs in both themes.
 *
 * RED IS NOT ONE OF THEM. It means danger everywhere else in this system, and a
 * person is not a warning. The order is arbitrary — a hash mod 8 makes no two
 * entries neighbours — so a family is replaced IN PLACE rather than reordered.
 */
export declare const IDENTITY_FAMILIES: readonly ["cyan", "orange", "green", "teal", "blue", "indigo", "violet", "pink"];
export type IdentityFamily = (typeof IDENTITY_FAMILIES)[number];
/**
 * WHO A SUBJECT IS, in the kit's ONE reading: the name they were given, else what
 * they sign in as. Blank where the caller knows neither — a mark keyed on nothing
 * is dealt no family, and `memberDisplayName` supplies the word to print in its
 * place.
 *
 * A function rather than a convention, because the convention is what failed: four
 * entries each spelled the fallback for themselves and two spelled it differently.
 */
export declare function identityKey(name?: string | null, identity?: string | null): string;
/**
 * The family a subject's key falls on, or `undefined` where there is no key —
 * nothing to identify, so the mark keeps the neutral ground the sheet paints.
 *
 * NFC first, because Vietnamese arrives both composed and decomposed and the
 * two spellings of one name must not be two people; then case-folded, because a
 * display name retyped in capitals is the same person.
 */
export declare function identityFamily(key: string): IdentityFamily | undefined;