A coastal bathroom captures a breezy, beach-inspired vibe with light, airy tones like white, beige, and soft blues. Key elements include natural materials like wood, wicker, and stone, paired with nautical accents such as seashells, driftwood, or rope details. Simple, clean lines, ample natural light, and decor like marine prints or glass jars create a serene, refreshing space reminiscent of the seaside.