import { ChannelBlender, RGB, RGBA } from './types';
/**
 * Blend two colors in a separable way (i.e. each color channel individually)
 *
 * @param backdrop The RGBA backdrop color
 * @param source   The RGBA source color
 * @param callback The blend mode callback to apply
 */
export default function separableBlend(backdrop: RGBA, source: RGBA, callback: ChannelBlender): RGB;
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