Complex sentence: Visitors can sample the smells of each Guinness ingredient in the Tasting Rooms, which are coloured with a unique lighting design that emits Guinness' gold and black branding.
Split into simpler sentences: Visitors can sample the smells of each Guinness ingredient in the Tasting Rooms. The Tasting Rooms are coloured with a unique lighting design that emits Guinness' gold and black branding.