/**
 * Gradient Generator Service
 *
 * Generates beautiful random gradients for simple backgrounds.
 * Uses color theory to create harmonious color combinations.
 */
export interface GradientConfig {
    colors: string[];
    direction: number;
}
export declare class GradientGeneratorService {
    /**
     * Preset beautiful gradients
     */
    static readonly PRESET_GRADIENTS: GradientConfig[];
    /**
     * Generate a random gradient with 2-4 colors
     */
    static generateRandomGradient(numColors?: number): GradientConfig;
    /**
     * Convert HSL to HEX color
     */
    private static hslToHex;
    /**
     * Get a random preset gradient
     */
    static getRandomPreset(): GradientConfig;
    /**
     * Validate gradient colors
     */
    static isValidGradient(colors: string[]): boolean;
}
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