blue is one of the 3 primary colors
Oh wow, I didn't know that! What other colors are primary colors?
the human eye perceives blue as dominant. it is the most important of the primary colors
Actually, what is a primary color?
primary colors are colors not mixed with others, like the basics, 
So, a color like green is a primary color?
An optical effect called Tyndall scattering explains blue eyes. Distant objects appear more blue because of another optical effect called aerial perspective.
Blue has been an important colour in art and decoration since ancient times. The semi-precious stone lapis lazuli was used in ancient Egypt for jewellery and ornament and later, in the Renaissance, to make the pigment ultramarine, the most expensive of all pigments. In the eighth century Chinese artists used cobalt blue to colour fine blue and white porcelain. In the Middle Ages, European artists used
refers to red, green, and blue as the primary colors.
Hue is a term describing a pure color, that is, a color not modified by tinting or shading (see below). In additive colors, hues are formed by combining two primary colors. When two primary colors are combined in equal intensities, the result is a "secondary color".
Basics of color Color wheel.
A color wheel is a tool that provides a visual representation of the relationships between all possible hues. The primary colors