The term blue generally describes colours perceived by humans observing light with a dominant wavelength that's between approximately 450 and 495 nanometres. Most blues contain a slight mixture of other colours; azure contains some green, while ultramarine contains some violet.

The meaning of BLUE is of the color whose hue is that of the clear sky : of the color blue. How to use blue in a sentence.

2025年1月17日 · Blue, in physics, light in the wavelength range of 450–495 nanometers in the visible spectrum. In art, blue is a color on the conventional wheel, located between green and violet and opposite orange, its complement.

Blue is the color of the Earth 's sky and sea. Earth looks blue when seen from outer space by astronauts. It is the color of cold, introversion and openness, by opposition to the red, which is the color of warm, extroversion and the closure.

If you’re American or European, blue might be your favorite color (it wins the polls as most popular), but did you know that it has a long and fascinating history? From barbarians, to royals, to...

6 天之前 · Blue, a color that commands a unique position in the color spectrum, has permeated various aspects of our lives, imbuing them with profound meanings and emotions. As the color of the sky and sea, it has been a ceaseless source of inspiration and symbolism throughout history and across cultures.

2018年2月12日 · From the decorative "Egyptian blue" of the ancient world, to the precious ultramarine and prussian blue pigments used in some of the world’s greatest masterpieces, the color blue has a fascinating history spanning around 6,000 years. Here's a …