Brown is a composite color. In the CMYK color model used in printing or painting, brown is made by combining red, black, and yellow, or red, yellow, and blue.
BLUE: The color of the sky, water, some gems and flowers.
This group is for images with two main colors of brown and blue. It can be nature, architecture, abstract or any other. Other colors like black, red, or, purple can only show as outlines or in small amounts. Brown and blue must dominate. Any hue of these two colors is acceptable. Have fun!