Blue hour — a stretch of time Soon ahead of dawn (or immediately after sunset), when the sky turns intense blue, as a result of which saturated blue shades start to prevail in purely natural light. Welcome! On our site you could often get updated and detailed information regarding sunset http://digitaledemonen.nl/de-ultieme-gids-voor-het-kiezen-van-de-juiste-opstalverzekering-voor-uw-eigendom/