If you want to bring in some color without stepping too far out of neutral territory, consider painting your walls ... lighter green with a gray undertone, so it'll go well with gray floors ...
In the 2010s and early 2020s, there was one king of interior design—"millennial gray." Characterized by a monochromatic palette of gray tones, the color ... chose green for an accent wall.
Undertones of blue or green make it a cool color ... blue all pair nicely against gray walls. Blues add a touch of calm to your space, making a set of ceiling-to-floor curtains in one of these ...