import { NoAlphaBlender, RGBA } from './types';
/**
 * Blend two colors in a non-separable way
 *
 * @param backdrop The background color as an { r,g,b,a } object
 * @param source   The foreground color as an { r,g,b,a } object
 * @param callback The blend mode callback to apply
 */
export default function nonSeparableBlend(backdrop: RGBA, source: RGBA, callback: NoAlphaBlender): import("./types").RGB;
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