import { Title, Meta } from '@angular/platform-browser';
import * as i0 from "@angular/core";
export declare class TitleTagService {
    private titleService;
    private metaService;
    private urlMeta;
    private titleMeta;
    private descriptionMeta;
    private imageMeta;
    private secureImageMeta;
    private twitterTitleMeta;
    private twitterImageMeta;
    constructor(titleService: Title, metaService: Meta);
    setTitle(title: string): void;
    setSocialMediaTags(url: string, title: string, description: string, image: string): void;
    private setTags;
    stringToColor(str: string): string;
    getContrast(_hexcolor: any): string;
    static ɵfac: i0.ɵɵFactoryDeclaration<TitleTagService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<TitleTagService>;
}
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