import { NickProcessArtfact } from '@mrp-brasil/nick-process-commons';
import { Observable } from 'rxjs';
export declare class ColorHook {
    contrastColor(input: NickProcessArtfact): Observable<NickProcessArtfact>;
    darkLightColor(input: NickProcessArtfact): Observable<NickProcessArtfact>;
    randomColor(input: NickProcessArtfact): Observable<NickProcessArtfact>;
    randomPastelColor(input: NickProcessArtfact): Observable<NickProcessArtfact>;
}
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