/**
 * ZUI Color System
 * Color tokens derived from ZeppOS 3.0 design specifications
 *
 * The color system is colorful and full of warmth, designed to make users
 * feel light, relaxed, and evoke pleasant emotions.
 */
import type { ThemeColors } from '../core/types';
/**
 * Convert hex color to number (for ZeppOS widgets)
 * @param hex - Hex color string (e.g., '#FFFFFF')
 */
export declare function hexToNumber(hex: string): number;
/**
 * Convert number to hex color string
 * @param num - Color number
 */
export declare function numberToHex(num: number): string;
/**
 * Convert hex to RGB components
 * @param hex - Hex color string
 */
export declare function hexToRgb(hex: string): {
    r: number;
    g: number;
    b: number;
};
/**
 * Convert RGB to hex color string
 * @param r - Red component (0-255)
 * @param g - Green component (0-255)
 * @param b - Blue component (0-255)
 */
export declare function rgbToHex(r: number, g: number, b: number): string;
/**
 * Parse color string to hex (supports rgba)
 * @param color - Color string
 */
export declare function parseColor(color: string): string;
/**
 * Apply brightness adjustment (for pressed/disabled states)
 * @param hex - Hex color string
 * @param factor - Brightness factor (0-1)
 */
export declare function adjustBrightness(hex: string, factor: number): string;
/**
 * Calculate alpha value from color (for rgba support)
 * @param color - Color string
 */
export declare function getAlpha(color: string): number;
/**
 * Apply alpha to a hex color
 * @param hex - Hex color string
 * @param alpha - Alpha value (0-1)
 */
export declare function withAlpha(hex: string, alpha: number): string;
/**
 * Calculate contrast ratio between two colors (WCAG)
 * @param color1 - First color
 * @param color2 - Second color
 */
export declare function getContrastRatio(color1: string, color2: string): number;
/**
 * System colors for key content, alerts, controls, and graphics
 */
export declare const systemColors: {
    readonly blue: "#0986D4";
    readonly green: "#2DC84D";
    readonly red: "#FA5151";
    readonly orange: "#FF9500";
    readonly yellow: "#FFCC00";
    readonly purple: "#AF52DE";
    readonly pink: "#FF2D55";
    readonly teal: "#5AC8FA";
    readonly cyan: "#34C759";
};
/**
 * Text colors for various text levels
 */
export declare const textColors: {
    readonly title: "#FFFFFF";
    readonly subtitle: "rgba(255, 255, 255, 0.72)";
    readonly body: "rgba(255, 255, 255, 0.60)";
    readonly caption: "rgba(255, 255, 255, 0.44)";
    readonly disabled: "rgba(255, 255, 255, 0.28)";
};
/**
 * Background colors for surfaces
 */
export declare const backgroundColors: {
    readonly primary: "#000000";
    readonly elevated: "#1C1C1E";
    readonly secondary: "#2C2C2E";
    readonly tertiary: "#3A3A3C";
    readonly overlay: "rgba(0, 0, 0, 0.6)";
};
/**
 * Interactive state modifiers
 * Pressed state: 28.6% brightness reduction (multiply by 0.714)
 * Disabled state: 50% brightness reduction (multiply by 0.5)
 */
export declare const stateModifiers: {
    readonly pressed: 0.714;
    readonly disabled: 0.5;
};
/**
 * Health feature colors
 */
export declare const healthColors: {
    readonly heartRate: {
        readonly relaxed: "#94D15E";
        readonly warmUp: "#FFCC00";
        readonly fatBurn: "#FF9500";
        readonly cardio: "#FF6B00";
        readonly peak: "#FA5151";
    };
    readonly sleep: {
        readonly awake: "#666666";
        readonly rem: "#7B68EE";
        readonly light: "#4FC3F7";
        readonly deep: "#0D47A1";
    };
    readonly stress: {
        readonly relaxed: "#94D15E";
        readonly normal: "#FFCC00";
        readonly medium: "#FF9500";
        readonly high: "#FA5151";
    };
    readonly vo2max: {
        readonly excellent: "#2DC84D";
        readonly good: "#94D15E";
        readonly fair: "#FFCC00";
        readonly poor: "#FF9500";
        readonly veryPoor: "#FA5151";
    };
    readonly trainingLoad: {
        readonly recovery: "#4FC3F7";
        readonly productive: "#2DC84D";
        readonly maintaining: "#FFCC00";
        readonly overReaching: "#FF9500";
        readonly detraining: "#FA5151";
    };
};
/**
 * Auxiliary colors for charts and data visualization
 */
export declare const auxiliaryColors: readonly ["#5AC8FA", "#4CD964", "#FF9500", "#FF3B30", "#AF52DE", "#FF2D55", "#5856D6", "#34C759"];
/**
 * Default color theme
 */
export declare const defaultColors: ThemeColors;
/**
 * Get color by path (e.g., 'primary.blue', 'text.title')
 */
export declare function getColor(path: string, colors?: ThemeColors): string;
/**
 * Get pressed state color
 */
export declare function getPressedColor(color: string): string;
/**
 * Get disabled state color
 */
export declare function getDisabledColor(color: string): string;
/**
 * Check if color meets accessibility contrast requirements
 * @param foreground - Foreground color
 * @param background - Background color
 * @param level - AA (4.5:1) or AAA (7:1)
 */
export declare function meetsContrastRequirement(foreground: string, background: string, level?: 'AA' | 'AAA'): boolean;
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