The main color scheme used in DE&T's CI is classified as DE&T Blue, which is the representative color of the company, and DE&T Green, the main color. These are main components to create consistant image of company externally. DE&T blue(DIC221) that means creation of blue ocean in the field of digital equipments and DE&T green(DIC131) which is environmental friendly are widely used complementarily. When expressing the representative color and the main color of the company, pay special attention to accurate color, brightness, saturation and so on.