Love black and white pillows with a brown couch. Throw a printed teal pillow on your non leather chair and hang Sam/tyler pic in that room to tie in teal rug. Then add white tv console and switch out a few shelf items with some black and white items.
Nothing adds life + color to a room like plants. Whether your decor aesthetic is minimal, casually bohemian, or modern eclectic, adding a bit of greenery to a room helps to bring everything together and make it feel "complete".