export type DiagramTheme = {
    palette: {
        primary: string;
        activityFill: string;
        activityStroke: string;
        decision: string;
        noteFill: string;
        noteStroke: string;
        manualFill: string;
        manualText: string;
        flowPrimary: string;
        flowSecondary: string;
        alert: string;
        automation: string;
        event: string;
        headerBanner: string;
        phaseBanner: string;
        swimlaneHeader: string;
        swimlaneBody: string;
        erdJunction: string;
        erdExternal: string;
    };
    connectors: {
        primaryStrokeWidth: number;
        secondaryStrokeWidth: number;
        referenceStrokeWidth: number;
        lineType: string;
    };
    typography: {
        fontFamily: string;
        minFontSize: number;
        headerFontSize: number;
    };
};
export declare function diagramThemeDefaultsJson(): string;