Although the right features and behavior are essential to successful product design, the way they are presented can be just as important.
The application of type, color, icons, and other aspects of visual design are critical to product or website usability. Visual design choices are also critical to connecting emotionally with your customers (and to selling more products). Visual interface design combines detailed interaction design, screen layout, and branding to ensure a well-conceived, well-behaved product is also a usable and desirable one.