When orange and blue are mixed together, it is deep purple, more blue is close to black, and more orange is the color of soil.

The basic colors that can't be decomposed are called primary colors, which can synthesize other colors, but other colors can't restore the original colors. We usually say three primary colors, namely red, green and blue. The three primary colors can mix all colors and add up to white at the same time, and blue is one of the primary colors.

Extended information:

Complementary color law:

Where two colored lights are mixed in a proper proportion to produce white, they are complementary colors. For example, red and light turquoise, orange and cyan, yellow and blue, green and purple are all complementary colors.

Intermittent color law:

When two complementary colors are mixed, a new intermediate color between them will be produced. For example, red and yellow mix to produce orange, and blue and red mix to produce purple. The hue of the middle color is more than one color, and the saturation depends on the position of the two colors in the spectral trajectory. The closer it is, the more saturated it is.

substitution law:

if color A+ color B= color c, if there is no color b, and color X+ color Y= color b. Then a+(x+y) = C. It shows that each mixed color itself can also be obtained by mixing other colors. For example, if yellow and blue are mixed, yellow can be replaced by red and green, because "red and green = yellow".

reference link: Baidu encyclopedia? Color mixing