import type { Ref } from 'vue';
export declare function useHeader($emit: any, color: string, page?: {
    widthScale?: Ref<number>;
    heightScale?: Ref<number>;
} | null): {
    svgStyle: import("vue").ComputedRef<{
        zoom: number;
    }>;
    dark: import("vue").ComputedRef<string>;
    light: import("vue").ComputedRef<string>;
    resize: ($el?: HTMLElement) => void;
    color: string;
};