/**
 * Color Converter - CSS colors to ANSI extended color codes
 * Supports 256-color and truecolor (24-bit) terminals
 */
export type ColorCapability = 'full' | 'basic' | 'none';
export interface RGB {
    r: number;
    g: number;
    b: number;
}
export declare function hexToRgb(hex: string): RGB;
export declare function rgbToHex(r: number, g: number, b: number): string;
export declare function hexTo256(hex: string): number;
export declare function colorToHex(color: string): string;
export declare function getANSIForeground(color: string, capability: ColorCapability): string;
export declare function getANSIBackground(color: string, capability: ColorCapability): string;
export declare function getANSI256Foreground(colorIndex: number): string;
export declare function getANSI256Background(colorIndex: number): string;
export declare function extractGradientColors(gradient: string): string[];
export declare function gradientToSingleColor(gradient: string): string;
export declare function cssColorToANSI(cssColor: string, capability: ColorCapability, isBackground?: boolean): string;
export declare const ANSI: {
    reset: string;
    bold: string;
    dim: string;
    italic: string;
    underline: string;
    blink: string;
    inverse: string;
    hidden: string;
    strikethrough: string;
    fg: {
        black: string;
        red: string;
        green: string;
        yellow: string;
        blue: string;
        magenta: string;
        cyan: string;
        white: string;
        gray: string;
        brightRed: string;
        brightGreen: string;
        brightYellow: string;
        brightBlue: string;
        brightMagenta: string;
        brightCyan: string;
        brightWhite: string;
    };
    bg: {
        black: string;
        red: string;
        green: string;
        yellow: string;
        blue: string;
        magenta: string;
        cyan: string;
        white: string;
        gray: string;
        brightRed: string;
        brightGreen: string;
        brightYellow: string;
        brightBlue: string;
        brightMagenta: string;
        brightCyan: string;
        brightWhite: string;
    };
    rgb: (r: number, g: number, b: number) => string;
    bgRgb: (r: number, g: number, b: number) => string;
    color256: (n: number) => string;
    bgColor256: (n: number) => string;
};
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