The color produced by mixing blue and yellow is green. This combination of primary colors is fundamental in color theory, particularly in art and design. When blue, which is a cool color, is blended with yellow, a warm color, the result is a secondary color—green—that encompasses a variety of shades, from light lime to deep forest green. Understanding color mixing is crucial in various fields, including painting, graphic design, and interior decorating, as combinations can evoke different moods and aesthetics. The use of colors can significantly influence perception and visual harmony in any creative endeavor.