Blue and orange make a variation of the color brown when mixed together. Brown is a tertiary color, as it is made from combinations of primary and secondary colors.
Red, yellow and blue are primary colors, while orange, purple and green are secondary colors. On the color wheel, each primary color has a secondary color to complement it. Orange and blue are complementary colors; this means that orange and blue are located directly across from each other on the color wheel. In addition, purple's complement is yellow, and red's complement is green. Different varieties of the color brown are achieved by combining any two complementary colors together.