For a classic and timeless look, you should combine gray with white. This pairing creates a clean and elegant aesthetic, providing a sense of freshness to your space. If you want to create a warmer ambiance, then combine gray with earthy tones like beige, taupe, or soft browns. This combination adds a touch of warmth, creating a cozy and inviting atmosphere. You can combine gray with a wide range of colors, according to your style and preferences.