export interface Rgb {
    r: number;
    g: number;
    b: number;
}
export interface Hsl {
    h: number;
    s: number;
    l: number;
}
export interface Theme {
    primary: string;
    onPrimary: string;
    primaryContainer: string;
    onPrimaryContainer: string;
    secondary: string;
    onSecondary: string;
    secondaryContainer: string;
    onSecondaryContainer: string;
    tertiary: string;
    onTertiary: string;
    tertiaryContainer: string;
    onTertiaryContainer: string;
    error: string;
    onError: string;
    errorContainer: string;
    onErrorContainer: string;
    background: string;
    onBackground: string;
    surface: string;
    onSurface: string;
    surfaceVariant: string;
    onSurfaceVariant: string;
    outline: string;
    outlineVariant: string;
    shadow: string;
    scrim: string;
    inverseSurface: string;
    inverseOnSurface: string;
    inversePrimary: string;
    surfaceDim: string;
    surfaceBright: string;
    surfaceContainerLowest: string;
    surfaceContainerLow: string;
    surfaceContainer: string;
    surfaceContainerHigh: string;
    surfaceContainerHighest: string;
}
/**
 * Parse a CSS color string into an {@link Rgb}.
 *
 * Accepts 6-digit hex (`#rrggbb`), 3-digit shorthand hex (`#rgb`, expanded by
 * doubling each nibble), and functional `rgb()` / `rgba()` notation (commas or
 * spaces, integer or percentage channels). Named colors and other formats are
 * not supported and yield `{ r: NaN, g: NaN, b: NaN }`; callers that accept
 * arbitrary input should validate before relying on the result.
 *
 * The leading `#` is optional for hex input.
 */
export declare function hexToRgb(hex: string): Rgb;
export declare function rgbToHex(r: number, g: number, b: number): string;
/**
 * Calculate relative luminance of a color per WCAG 2.1
 * https://www.w3.org/WAI/GL/wiki/Relative_luminance
 */
export declare function getLuminance(rgb: Rgb): number;
/**
 * Calculate contrast ratio between two colors per WCAG 2.1
 * Returns a value between 1 and 21
 */
export declare function getContrastRatio(fg: Rgb, bg: Rgb): number;
/**
 * Check if contrast meets WCAG AA standard (4.5:1 for normal text, 3:1 for large text)
 */
export declare function meetsContrastAA(fg: string | Rgb, bg: string | Rgb, largeText?: boolean): boolean;
/**
 * Check if contrast meets WCAG AAA standard (7:1 for normal text, 4.5:1 for large text)
 */
export declare function meetsContrastAAA(fg: string | Rgb, bg: string | Rgb, largeText?: boolean): boolean;
export declare function generateTheme(seedColor: string, mode?: 'light' | 'dark'): Theme;
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