/**
 * Interpolate between two colors
 * @param color1 - First color (hex or hsl)
 * @param color2 - Second color (hex or hsl)
 * @param amount - 0 = color1, 1 = color2, 0.5 = middle
 */
export declare function interpolateColor(color1: string, color2: string, amount: number): string;
export declare function opacify(color: string, opacity?: number): string;
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