/**
 * Utility functions for handling color transparency while preserving color positions
 */
export interface RGB {
    r: number;
    g: number;
    b: number;
    a: number;
}
export declare class ColorTransparencyHandler {
    private persistentOpacity;
    private isInternalUpdate;
    private isColorSelectUpdate;
    constructor(initialOpacity?: number);
    /**
     * Converts hex color to RGBA while preserving opacity
     */
    hexToRgba(hex: string): RGB;
    /**
     * Converts RGBA values to hex color
     */
    rgbaToHex(r: number, g: number, b: number, a: number): string;
    /**
     * Updates opacity from slider position
     */
    updateOpacityFromPosition(event: MouseEvent, sliderElement: HTMLDivElement, onUpdate: (hexValue: string, rgb: RGB) => void, currentRgb: RGB): void;
    /**
     * Updates opacity from input value
     */
    updateOpacityFromInput(inputValue: number, onUpdate: (hexValue: string, rgb: RGB) => void, currentRgb: RGB): void;
    /**
     * Gets the current opacity percentage
     */
    getOpacityPercentage(): number;
    /**
     * Gets the current persistent opacity value
     */
    getCurrentOpacity(): number;
    /**
     * Checks if an update is internal
     */
    isUpdatingInternally(): boolean;
    /**
     * Checks if an update is from color select
     */
    isUpdatingFromColorSelect(): boolean;
    /**
     * Sets the color select update flag
     */
    setColorSelectUpdate(value: boolean): void;
}
export declare function getRGBABorder(color: string, opacity: number): string;