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How to decorate a formal living room
Go monochrome.
Choosing decor in black, white, and gray gives the room a sophisticated look. It's a color scheme that's classy without being overbearing, and you can find a wide variety of decor to fit this scheme.
Tone done bold colors with white finishes. Bold colors may seem like too much for a formal living room, but they can work if you find the right accents.