Geometric patterns can range from simple shapes like squares and triangles to more complex designs like chevrons, diamonds, or hexagons. Blackout curtains are made from a special type of fabric that is designed to completely block out sunlight, making them a popular choice for bedrooms or home theaters. Geometric blackout curtains can be found in a variety of colors, ranging from neutral tones to bright and bold hues, and can be used to add a sense of texture and visual interest to a room.