Choosing the right curtain color can create the illusion of a bigger room. Light, airy hues like whites and pastels tend to make spaces feel more open and spacious. Incorporating vertical stripes or opting for sheer materials can also contribute to an expanded feel. The right balance between curtain color and room lighting is key to enhancing perception of space. Picking complementary or matching wall and curtain colors can seamlessly blend the elements, further augmenting room size perception.