Titanium oxides are used in some high-tech applications including electrochromic devices, dye-sensitized solar cells (DSSC), photocatalysts and antireflection coatings [1]. Expressive colours of titanium oxides, nitrides and oxynitrides deposited on metal, make it suitable to applied as a decorative material for architecture, the automotive industry, electronics and jewellery [2,3]. In this work we would like to present the study of colour TiO x /Ti/glass systems. The preliminary investigation of this material were shown (as a poster) during 8th Workshop Ellipsometry (2014, Dresden). The aim of this work is the study of optical properties and microstructure of the titanium oxide layer and titanium undercoat formed by the gas injection magnetron sputtering (GIMS) method [4,5] and its impact on a colour of samples. We would like to present a technological process by which one can obtain colour layers, e.g. for architectural glazing, as well as the optical function and microstructural properties of the produced samples.