What colour is blue?

Question

lest examine frequencies and optical bandwidth here

Answer 1

The term Blue may refer any of a number of similar colors. When blue is a pure color from a single source, it corresponds with a wavelength range of about 440–490 nanometers. Blue is considered to be one of the three primary additive colors in RGB system; blue light has the shortest wavelength range of the three additive primary colors. The English language commonly uses "blue" to refer to any color from navy blue to cyan.

The complementary (opposite) color of blue is yellow.

Answer 2

Blue. That's like saying what season is summer. You seem to suggest that either we need to know what color blue is, or we have to examine frequencies of light and optical bandwidth, something I take it you don't want to do.

Actually, if something appears blue, that may not be because it emit blue wavelengths. Perhaps instead it emits violet, green, and red wavelengths in such a combination that the human brain interprets it as blue. Blue is a human concept, not an intrinsic property of objects. The brain takes all these wavelengths and converts them into a three-dimensional space of colors.

Answer 3

Blue

Answer 4

Blue is actualy that portion of the eloctromagnetic spectrum perceived by the human eye. It is centered around 460 nm.

Answer 5

420–490 nanometers

Answer 6

It is every color except blue. That is why when light hit's it, every color is absorbed except the color that reflects back - blue. Depends on your perspective. If you think the aborbtion of colors = its true color, then that can be true too.

Answer 7

blue

Answer 8

Why are you asking the question when it looks as if you already know the answer?

Answer 9

blue?

Answer 10

ummm, blue IS blue