In interior design, bright and airy spaces are almost always more welcome than dark ones. However, this doesn't mean that dark colors can't be successfully used. This lovely mini flat is a great example of a dark masculine interior. Masculine decors tend to be wonderfully uncomplicated, being focused on practicality and functionality. They're also usually defined by a restrained palette of colors and materials and by overall minimalism and simple forms. The art is to keep them from being boring or unappealing.