export declare class ColorService {
    /**
     * the gradiant will start from here, when the given index is equal to 0
     */
    private startingColor;
    /**
     * the gradiant will end to this color, when the given index is equal to 100
     */
    private endingColor;
    constructor();
    /**
     * Initialize the color boundaries
     * @param startingColor the gradiant will start from here, when the given index is equal to 0
     * @param endingColor the gradiant will end to this color, when the given index is equal to 100
     */
    initBoundaryColors(startingColor: string, endingColor: string): void;
    red(index: number): string;
    green(index: number): string;
    blue(index: number): string;
    /**
     * Return a color associated to the given level of risk.
     * @param level the level of the measure
     */
    color(level: number): string;
}