Color contrast directly influences how we perceive boundaries in a room. Using high-contrast tiles—such as dark tiles with light grout—emphasizes the grout grid, which acts as a visual 'stop' for the eye, potentially making a small room feel enclosed. Conversely, using low-contrast tiles and grout creates a seamless appearance, allowing the floor or wall to appear as a single, expansive surface. Strategic use of reflective tile finishes can also add depth to smaller areas by bouncing light around, further increasing the perceived dimensions of the room.

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