Turquoise naturally brings associations of water, sky and holidays, but the surrounding materials can completely change that impression.
Pairing it with pale timber, linen and white stone will reinforce a relaxed, coastal feeling. Swap those for darker timber, brushed brass, warm cream or richer stone and it becomes much more sophisticated.
The tile's format matters too. A small, highly glazed turquoise tile can feel lively and decorative, while a larger or more restrained format can allow the colour to read almost architecturally.
You don't need to avoid coastal associations if you like them. The useful point is that turquoise doesn't lock you into one aesthetic. Materials and styling determine whether it feels Mediterranean, contemporary, vintage-inspired or softly natural.