/**
 * The three suggestion marks.
 *
 * - `veltSuggestion` (wrapper) spans the whole suggestion and carries its identity and author.
 * - `veltSuggestionDeletion` marks text the suggestion removes.
 * - `veltSuggestionInsertion` marks text the suggestion adds.
 *
 * The suggestion's text lives in the document only; it is never copied into mark attributes.
 * Content saved by the earlier copy-paste integration (`data-velt-suggestion-id`) still parses.
 */
import { Mark } from '@tiptap/core';
/** A plain colour value (hex, rgb[a], hsl[a] or a colour name), else the default — it is rendered into `style`. */
export declare const safeColor: (value: unknown) => string;
export declare const SuggestionMark: Mark<any, any>;
export declare const SuggestionDeletionMark: Mark<any, any>;
export declare const SuggestionInsertionMark: Mark<any, any>;