/**
 * @fileoverview Ultrathink rainbow gradient effect.
 * Provides rainbow gradient color generation for shimmer animations.
 * "Ultrathink" is Claude's intensive thinking mode for deep analysis.
 */
import type { ShimmerColorGradient } from './types';
/**
 * Rainbow gradient colors used for ultrathink effect.
 * This gradient cycles through the full color spectrum with smooth transitions.
 */
export declare const RAINBOW_GRADIENT: ShimmerColorGradient;
/**
 * Generate rainbow gradient colors for any text length.
 * Colors are distributed evenly across the text by cycling through the gradient.
 */
export declare function generateRainbowGradient(textLength: number): ShimmerColorGradient;
