import { type RgbColor } from "@earendil-works/pi-tui";
import type { ThemeBg, ThemeColor } from "./theme-class.ts";
export declare const SYSTEM_THEME_NAME = "system";
type ThemeAppearance = "dark" | "light";
type ThemeToken = ThemeColor | ThemeBg | "scrollbarTrack" | "thinkingMax";
export interface SystemThemeInput {
    foreground?: RgbColor;
    background?: RgbColor;
    palette?: RgbColor[];
    saturation?: number;
    appearanceHint?: ThemeAppearance;
}
export interface SystemThemeColors {
    colors: Record<ThemeToken, string | number>;
    dim: ThemeColor[];
    appearance: ThemeAppearance | undefined;
}
export declare function relativeLuminance({ r, g, b }: RgbColor): number;
export declare function wcagContrast(first: RgbColor, second: RgbColor): number;
export declare function terminalAppearance(background: RgbColor, foreground?: RgbColor): ThemeAppearance;
export declare function generateSystemThemeColors(input: SystemThemeInput): SystemThemeColors;
export {};
//# sourceMappingURL=system-theme.d.ts.map