/**
 * theme — semantic colour tokens, resolved and downsampled to the terminal's
 * capability. Themes are immutable; `extend` creates derived ones.
 */
import type { AnsiColor, ColorLevel } from '../ansi/index.js';
import type { ColorRef } from '../frame/index.js';
export type Color = string;
export interface ThemeTokens {
    primary: Color;
    secondary: Color;
    success: Color;
    warning: Color;
    danger: Color;
    muted: Color;
    foreground: Color;
    background: Color;
    border: Color;
}
export interface Theme {
    readonly tokens: ThemeTokens;
    resolve(ref: ColorRef | undefined, level: ColorLevel): AnsiColor;
    extend(partial: Partial<ThemeTokens>): Theme;
}
export declare function createTheme(tokens?: Partial<ThemeTokens>): Theme;
export declare const defaultTheme: Theme;
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