What is Redness?

Red is the color at the end of the spectrum of visible light next to orange and opposite violet. It is evoked by light with a predominant wavelength of roughly 620–740 nm. Red is one of the additive primary colors of light, along with green and blue, which in RGB color systems are combined to create all the colors on a computer monitor or television screen. It is also one of the subtractive primary colors, along with yellow and blue, of the RYB color space and traditional color wheel used by painters and artists.

Reds can vary in shade from very light pink to very dark maroon or burgundy; and in hue from the bright orange-red scarlet or vermilion to the bluish-red crimson.

Red was widely used in prehistoric cave art, made with red hematite or iron oxide, or red ochre. Early civilizations in China, the Middle East and Europe made red dyes from the madder plant or from the a tiny insect called Kermes vermilio. Civilizations in the Americas made brilliant reds from another scale insect, the cochineal; ancient Chinese artists during the Han Dynasty used dye from the madder plant to color silk and pigments from lead oxide to color pottery.

In ancient Rome red symbolized blood and courage; Roman soldiers wore red tunics, and generals wore a scarlet cloak, and had their bodies painted completely in red during ceremonial triumphs. It also sometimes represented sin; the Book of Revelation described the ‘’scarlet whore of Babylon.” In the Middle Ages, red was the color of majesty; it was the color of the banners of the Byzantine Empire, and the Emperor Charlemagne painted his palace red and wore red shoes as symbol of his authority. In Christianity it represented the blood of Christ and the Christian martyrs; in 1295 it became the color worn by Cardinals of the Roman Catholic Church. Merchants and ordinary people wore clothing dyed with madder at celebrations. Nobles and merchants wore the more intense red made with Kermes. In the 16th century, Spanish merchants began to import cochineal into Europe, which made an even more brilliant red; it became the fashion color of the aristocracy.

Red also played an important role in the culture of Imperial China. In Chinese philosophy, red represented fire, one of the five elements. During the Zhou, Han, Jin, Song and Ming Dynasties, red was considered a noble color, and it was featured in all court ceremonies, from coronations to sacrificial offerings, and weddings. The gates of imperial palaces were usually painted red. Chinese artisans used the mineral cinnabar to produce the famous vermilion or “Chinese red” color of Chinese lacquerware.

During the French Revolution, some of the revolutionaries began to wear a red Phrygian cap, or liberty cap, modeled after the caps worn by freed slaves in Ancient Rome, and to carry red flags. In the mid-19th century, red became the color of a new political and social movement, socialism. It became the color of the worker's movement, of the French Revolution of 1848, of the Paris Commune in 1870, and of socialist parties across Europe.

In 1826 the organic compound alizarin, the coloring ingredient of madder, was discovered and in 1848 it was synthesized; it was cheaper and made a more lasting color, and quickly replaced natural vegetable dyes. In the late 19th and early 20th century, the German chemical industry invented two new synthetic red pigments: cadmium red, which was the color of natural vermilion, and Mars red, which was a synthetic red ochre. 19th century artists adopted the color alizarin crimson. In the 19th century artists also began to use red to create specific emotions, not just to imitate nature; Vincent Van Gogh wrote in 1888, “I sought to express with red and green the terrible human passions.”

In the 20th century, red was the color of revolution; it was the color of the Bolshevik Revolution in 1917 and of the Chinese Revolution of 1949, and later of the Cultural Revolution. Red was the color of Communist Parties from Eastern Europe to Cuba to Vietnam.

In nature, the red color of blood comes from hemoglobin, the iron-containing protein found in the red blood cells of all vertebrates. The red color of the Grand Canyon and other geological features is caused by hematite or red ochre, both forms of iron oxide. It also causes the red color of the planet Mars. The red sky at sunset and sunrise is caused by an optical effect known as Rayleigh scattering, which, when the sun is low or below the horizon, increases the red-wavelength light that reaches the eye. The color of autumn leaves is caused by pigments called anthocyanins, which are produced towards the end of summer, when the green chlorophyll is no longer produced. One to two percent of the human population has red hair; the color is produced by high levels of the reddish pigment pheomelanin (which also accounts for the red color of the lips) and relatively low levels of the dark pigment eumelanin.

Since red is the color of blood, it has historically been associated with sacrifice, danger and courage. Modern surveys in the United States and Europe show red is also the color most commonly associated with heat, activity, passion, sexuality, anger, love and joy. In China and many other Asian countries it is the color of happiness.

Questions and answers on "Redness"

i have a problem in my face...i was using tenovate GN cream from past 4 years and now i stopped because of this my skin got damaged it semms. skin colour also changed itching is there and dryness is more and also rashes will come and go again it will come.. my skin colou is some thing different it is not white also and black also, please advice me
Tenovate Gn is a very strong steroid cream and is not indicated for use over face and you have used it for 4 yrs over your face. The complaints of redness irritation dryness is all because of its prolonged use and sudden discontinuation.
Right now I would just advise you to use a calamine and...
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my 14-year old has a very painful earache - our provider is closed. ANY IDEAS!!??
Brief Answer:
Rule out foreign body, wax, insect

Detailed Answer:
Welcome to healthcare-magic
Greetings of the day

I would suggest the following probability as the cause of pain in your daughter and will also guide you to some extent to find out yourself what it could be( There is no...
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We are trying to conceive and currently halfway through our two week wait. Yesterday out of nowhere I had really strong pain around my vagina. Today it hurts to sit and walk, I am extremely sore and swollen to the point i feel ill from the pain. I have read about bartholins cysts and abscesses and believe that is what I have. How did i get this? Can this be caused by intercourse? Or is it linked with pregnancy in anyway? Can it affect pregnancy and how can I cure it at home?
Brief Answer:
It is not caused due to intercourse or pregnancy.

Detailed Answer:
Hello Michelle_anne_jackson
Thanks for writing to XXXXXXX

You need proper clinical examination.It is not caused due to intercourse and it is not linked to your pregnancy.
Your problem may be due to Bartholin's cyst...
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I had unprotected intercourse with someone the day before she got her period - the tip area of my penis had redness next day /was a week ago /redness goes back /forth but seems to be subsiding overall .
what is likely cause ? should I be concerned ? use any OTC cream etc ?
Sexually transmitted infections usually take at least 24 hrs to manifest.Also its accompanied by itching/rashes/eruptions etc. Its possible that there may have been some abrasions that may have caused the redness.If you had any discharge,pain,eruptions etc then infection is more likely. If...
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I have a yellowish film on both sides of my eye and in both eyes. The other day when I was putting my make up on I really noticed it. I thought it was, what I call an eye bugar . Sorry for the gross term. So I used to q tip to try and remove it but it was actually stuck to my eye. It could be raised by the q tip but was attached.
Dear baker, The yellowish film on both sides of your eye may be any mucoid discharge which would have got collected in your eyes.The tear film and the degenerated cells of your eyes sometimes amalgamate and form a mucoid discharge in the medial and lower part ie fornix region of your eyes.If...
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I met with an accident yesterday morning. My left eyes got swelled & left hand got injuries (Red skin at affected area). Right now i am using Betadine (Povidone Ointment) & taking tablet Pantocid (one tab every morning with empty stomach) & Emanzen D (Twice in a day) . Can you please suggest me some medicine so that my swelling and injuries will get cover up soon..Can i take Sporidex 500 mg as well..
The advice for any accident ncludes,
1) - proper cleaning of the injury & application of antiseptic ( as brtadine) ,if there is bleeding, tight bandage would control it.
- Injection tetanus toxoid.
- if it's a cut injury ,stitching under aseptic precautions by a trained person/doctor
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