import { Node } from '../../types/core';
/**
 * Extract group background color from node data
 */
export declare const getGroupBackground: (node: Node, isGroup: boolean) => string | undefined;
/**
 * Extract group opacity from node data
 */
export declare const getGroupOpacity: (node: Node, isGroup: boolean) => number | undefined;
/**
 * Calculate readable text color for group node
 */
export declare const getGroupTextColor: (groupBackground: string | undefined, isGroup: boolean) => string | undefined;
/**
 * Calculate background color with applied opacity
 */
export declare const getBackgroundWithOpacity: (groupBackground: string | undefined, groupOpacity: number | undefined, isGroup: boolean) => string | undefined;
export type NodeAppearance = {
    groupBackground: string | undefined;
    groupOpacity: number | undefined;
    groupTextColor: string | undefined;
    backgroundWithOpacity: string | undefined;
};
/**
 * Compute all appearance properties for a node
 */
export declare const computeNodeAppearance: (node: Node, isGroup: boolean) => NodeAppearance;
/**
 * Check if two appearances are equal
 */
export declare const areNodeAppearancesEqual: (prev: NodeAppearance, next: NodeAppearance) => boolean;