Combining blue with other colors can create a variety of aesthetic effects. Blue is often associated with calmness, stability, and serenity. When paired with warm colors like orange or red, it can create a striking contrast. With neutral tones like gray or beige, blue can create a balanced and sophisticated look. When used with other cool colors like green or purple, it can evoke a sense of harmony and tranquility. The choice of colors and their proportions can significantly impact the overall visual effect.