The 40th Conference on the History of Technology on 17-18 November 2017 is set to be a colorful event. The Conference will focus on Colors in Technology and Technology (or Technologies) in Colors, both in a European perspective and from a global-historical viewpoint. It will cover a wide range of topics relating to dyestuffs, pigments and paints: from manufacture and trade to color standardization and applications in industry and technology. A major focal point will be the restoration of historical coloring. We kindly invite interested persons involved in research, training and teaching to apply to present a paper.