import type { PageData } from '../format/document.js';
/**
 * Normalizes the supported fixed color forms to one renderer-safe CSS value.
 * Empty or non-color values disable the monochrome override.
 */
export declare function normalizeMonochromeColor(value: string | undefined): string | undefined;
/**
 * Returns a page view with vector/text/material colors replaced while keeping
 * geometry, line weights, source diagnostics, images and source objects intact.
 */
export declare function createMonochromePage(page: PageData, color: string): PageData;
/**
 * Rewrites only direct XPS color attributes. Resource references and image
 * brushes are left untouched; referenced SolidColorBrush/GradientStop colors
 * are rewritten when their XML resource part is read.
 */
export declare function applyXpsMonochromeXml(xml: string, color: string): string;
/** Preserves source brush alpha and combines it with an optional target alpha. */
export declare function monochromeColorWithAlpha(color: string, sourceColor?: string): string;