What is the difference between cyan and indigo

1, different meanings

Cyan: Cyan is a color between green and blue in the visible spectrum, somewhat similar to the color of the sky. Ancient original meaning is blue, but in painting colors, if it is blue mixed with a small amount of green (is one of the subtractive three primary colors), there are multiple levels. Similar to the color of emerald jade.

Indigo: A color that is brighter than pigment indigo but darker than fluorescent screen indigo. Usually colored by pigments or colored pencils. Indigo should not be seen as a separate color, but rather as a blue or violet color.

2, on behalf of the nature of different

Cyan: cyan is a symbol of spring. In China's ancient society, the color green has an extremely important meaning. It symbolizes strength, hope, simplicity and solemnity, which is the reason why traditional artifacts and costumes often use the color cyan.

Indigo: Indigo is a symbol of creativity, intuitive power and wisdom. It is the darkest of the seven colors, but contains red, which looks serene but hides vitality, and has a complex and incredible meaning.

3, different wavelengths

Indigo for the spectrum from the wavelength of 420 to 440 nm color, generally referred to between blue and violet blue-violet.

Cyan is a color between green and blue in the visible spectrum, with a wavelength of about 470 nm, similar to the color of the sky, and is one of the subtractive primary colors.

Expanded Information

Cyan in Ancient Writings

Anciently there is a saying that "cyan is taken from the blue, and the green is better than the blue"... The expression is from "Xunzi - Persuasion": "Green, taken from the blue, but green than blue; ice, water for it, but cold than water." The green here actually refers to a color between blue and purple, such as "Ultramarine" and "Green Lotus", which are usually classified as purple, but are actually a separate color family. In some regional dialects, the term "green" refers to the color black.

Cyan is a unique color in China, in China's ancient culture has the meaning of life, but also a symbol of spring, in the doctrine of the five elements, cyan is a kind of wood in the ancient text of Xunzi "persuasion": "green, taken from the blue, and blue in blue," in the blue is also the meaning of the black in the ji yun, "read the microcosmic notes," as: In Ji Yun's "Notes from the Hall of Readings", the green color is also black, and in Ji Yun's "Notes from the Hall of Readings", the green color refers to crops that have not matured in February and March, and the merchants give money to the farmers to buy green once they are ripe and collect the grain.

In China's ancient society, the color green has an extremely important meaning. It symbolizes strength, hope, simplicity and solemnity, which is also the reason why traditional artifacts and costumes often use the color green.

Baidu Encyclopedia - Cyan

Baidu Encyclopedia - Indigo