Small bathrooms need to feel light and airy. Choose a color scheme that is bright without being too bold. Sherbet-like shades are best, with bright white trim to keep the environment looking clean and crisp.
Neutral colors like beige and white are also good choices for small bathrooms. Dark colors cause small spaces to appear more cramped and cluttered. Light colors give the illusion of more space. Another easy design trick that opens up the feel of a tiny bathroom includes painting the walls to match the tub, toilet and sink. This causes an optical illusion that "washes out" the largest items in the room, blending them into the walls and making the room appear larger.