The three primary colors are red, blue and yellow. Primary colors, by definition, are the only colors that CANNOT be made by mixing two other colors. All other colors can be derived by mixing two or more colors. Since blue color is one of the three primary colors, it cannot be made with a combination of other colors. But if you have blue, you can make it light blue or dark blue. Blue mixed with a small amount of white makes it a sky blue (light blue) shade. Blue mixed with a small amount of black makes it a dark blue shade. Dark blue mixed with a small amount of purple (or violet) makes it a navy blue shade.
What two colors make blue?
No two colors can be mixed to get blue as it is a primary color (Red, blue and yellow are the primary colors of pigment)
Blue has to be obtained from nature and using blue other colors can be derived