/**
 * Pick the text color for a sidebar badge label drawn on a theme accent.
 * Keep this logic in sync with Magic Context so both sidebars make the same
 * contrast decision for shared themes.
 */
type Color = {
    r: number;
    g: number;
    b: number;
    a?: number;
};
export declare function readableTextColorOn(bg: Color): string;
export declare function badgeTextColor<T extends Color>(accent: T, background: T): T | string;
export {};
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