To make green countertops and brown tile floors look good together, use a calm, connective surface like a backsplash or updated flooring to bridge undertones. For example, a warm linen subway tile backsplash can harmonize both colors. Adding a carefully chosen runner or updated cabinet hardware can also unify the look. Layering these elements creates a balanced, intentional kitchen environment that feels modern and inviting without repainting cabinets immediately.