/**
 * Creates a linear gradient CSS string based on an array of colors.
 * @param {string[]} colors - An array of colors for the gradient.
 * @param {string} direction - The direction of the gradient. (Default: "to right")
 * @returns {string} The linear gradient CSS string.
 */
export declare const getLinearGradientString: (colors: string[], direction?: string) => string;