The first thing you should do is choose a nautical color palette. To do so, you can pick the same colors on your coastal shower curtain and scatter them around the room. For instance, if your shower curtain features a combination of light blues, greys, and creamy browns, you can easily tie these colors together through your bath rug, towels, walls, and bathroom decors.
While you’re at it, you might want to add other nautical colors, such as white, navy blue, and yellow into the mix. Keep in mind that it doesn’t matter whether your color scheme includes 2 or 4 colors as long as your bathroom looks refreshing and reminds you of how it feels to be at the beach.