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Indigo (band)
Indigo is a term used for a number of hues in the region of blue. The word comes from the ancient dye of the same name. The term "indigo" can refer to the color of the dye, various colors of fabric dyed with indigo dye, a spectral color, one of the seven colors of the rainbow as described by Isaac Newton, or a region on the color wheel, and can include various shades of blue, ultramarine, and green-blue. Since the web era, the term has also been used for various purple and violet hues identified as "indigo", based on use of the term "indigo" in HTML web page specifications. The word "indigo" comes from the Latin word , meaning "Indian", as the naturally based dye was originally exported to Europe from India. The Early Modern English word indigo referred to the dye, not to the color (hue) itself, and indigo is not traditionally part of the basic color-naming system. The first known recorded use of indigo as a color name in English was in 1289. Newton regarded indigo as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
India
India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since 2023; and, since its independence in 1947, the world's most populous democracy. Bounded by the Indian Ocean on the south, the Arabian Sea on the southwest, and the Bay of Bengal on the southeast, it shares land borders with Pakistan to the west; China, Nepal, and Bhutan to the north; and Bangladesh and Myanmar to the east. In the Indian Ocean, India is near Sri Lanka and the Maldives; its Andaman and Nicobar Islands share a maritime border with Thailand, Myanmar, and Indonesia. Modern humans arrived on the Indian subcontinent from Africa no later than 55,000 years ago., "Y-Chromosome and Mt-DNA data support the colonization of South Asia by modern humans originating in Africa. ... Coalescence dates for most non-European populations averag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abney Effect
The Abney effect or the purity-on-hue effect is the perception, perceived hue shift that occurs when white light is additive color, added to a spectral color, monochromatic light source. The addition of white light will cause a desaturation of the monochromatic source, as perceived by the human observer. However, a less intuitive effect of the perceived Electromagnetic spectrum#Visible radiation .28light.29, white light addition is the change in the apparent hue. This hue shift is physiological rather than physical in nature. This variance of hue as a result of the addition of white light was first described by the English chemist and physicist Sir William de Wiveleslie Abney in 1909, although the date is commonly reported as 1910. A white light source can be created by the combination of red, blue, and green light. Abney demonstrated that the cause of the apparent change in hue was the red and green light that comprised this light source, and that the blue light component had ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peru
Peru, officially the Republic of Peru, is a country in western South America. It is bordered in the north by Ecuador and Colombia, in the east by Brazil, in the southeast by Bolivia, in the south by Chile, and in the south and west by the Pacific Ocean. Peru is a Megadiverse countries, megadiverse country, with habitats ranging from the arid plains of the Pacific coastal region in the west, to the peaks of the Andes mountains extending from the north to the southeast of the country, to the tropical Amazon basin rainforest in the east with the Amazon River. Peru has Demographics of Peru, a population of over 32 million, and its capital and largest city is Lima. At , Peru is the List of countries and dependencies by area, 19th largest country in the world, and the List of South American countries by area, third largest in South America. Pre-Columbian Peru, Peruvian territory was home to Andean civilizations, several cultures during the ancient and medieval periods, and has one o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bangladesh
Bangladesh, officially the People's Republic of Bangladesh, is a country in South Asia. It is the List of countries and dependencies by population, eighth-most populous country in the world and among the List of countries and dependencies by population density, most densely populated with a population of over 171 million within an area of . Bangladesh shares land borders with India to the north, west, and east, and Myanmar to the southeast. It has a coastline along the Bay of Bengal to its south and is separated from Bhutan and Nepal by the Siliguri Corridor, and from China by the List of Indian states, Indian state of Sikkim to its north. Dhaka, the capital and list of cities and towns in Bangladesh, largest city, is the nation's political, financial, and cultural centre. Chittagong is the second-largest city and the busiest port of the country. The territory of modern Bangladesh was a stronghold of many List of Buddhist kingdoms and empires, Buddhist and List of Hindu empir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Egypt
Egypt ( , ), officially the Arab Republic of Egypt, is a country spanning the Northeast Africa, northeast corner of Africa and Western Asia, southwest corner of Asia via the Sinai Peninsula. It is bordered by the Mediterranean Sea to northern coast of Egypt, the north, the Gaza Strip of Palestine and Israel to Egypt–Israel barrier, the northeast, the Red Sea to the east, Sudan to Egypt–Sudan border, the south, and Libya to Egypt–Libya border, the west; the Gulf of Aqaba in the northeast separates Egypt from Jordan and Saudi Arabia. Cairo is the capital, list of cities and towns in Egypt, largest city, and leading cultural center, while Alexandria is the second-largest city and an important hub of industry and tourism. With over 109 million inhabitants, Egypt is the List of African countries by population, third-most populous country in Africa and List of countries and dependencies by population, 15th-most populated in the world. Egypt has one of the longest histories o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
East Asia
East Asia is a geocultural region of Asia. It includes China, Japan, Mongolia, North Korea, South Korea, and Taiwan, plus two special administrative regions of China, Hong Kong and Macau. The economies of Economy of China, China, Economy of Japan, Japan, Economy of South Korea, South Korea, and Economy of Taiwan, Taiwan are among the world's largest and most prosperous. East Asia borders North Asia to the north, Southeast Asia to the south, South Asia to the southwest, and Central Asia to the west. To its east is the Pacific Ocean. East Asia, especially History of China, Chinese civilization, is regarded as one of the earliest Cradle of civilization#China, cradles of civilization. Other ancient civilizations in East Asia that still exist as independent countries in the present day include the History of Japan, Japanese, History of Korea, Korean, and History of Mongolia, Mongolian civilizations. Various other civilizations existed as independent polities in East Asia in the past ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isatis Tinctoria
''Isatis tinctoria'', also called woad (), dyer's woad, dyer's-weed, or glastum, is a flowering plant in the family Brassicaceae (the mustard family) with a documented history of use as a blue dye and medicinal plant. Its genus name, ''Isatis'', derives from the ancient Greek word for the plant, . It is occasionally known as Asp of Jerusalem. Woad is also the name of a blue dye produced from the leaves of the plant. Woad is native to the steppe and desert zones of the Caucasus, Central Asia to Eastern Siberia and Western Asia but is now also found in South-Eastern and Central Europe and western North America. Since ancient times, woad was an important source of blue dye and was cultivated throughout Europe, especially in Western and Southern Europe. In medieval times, there were important woad-growing regions in England, Germany and France. Towns such as Toulouse became prosperous from the woad trade. Woad was eventually replaced by the more colourfast ''Indigofera tinctori ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Persicaria Tinctoria
''Persicaria tinctoria'' is a species of flowering plant in the buckwheat family. Common names include Chinese indigo, Japanese indigo and dyer's knotweed. It is native to Southern China and Vietnam, and has been introduced to other parts of China, as well as Germany, Japan, Korea, Tibet, North and South Caucasus, parts of the Russian Far-East, and Ukraine. The leaves are a source of indigo dye. It was already in use in the Western Zhou period ( 1045 BC – 771 BC), and was the most important blue dye in East Asia until the arrival of ''Indigofera'' from the south. See also * ''Indigofera tinctoria'' References Gallery Traditional natural dyeing (Korean blue) 2.jpg, Traditional natural dye Natural dyes are dyes or colorants derived from plants, invertebrates, or minerals. The majority of natural dyes are vegetable dyes from plant sources—roots, berry, berries, Bark (botany), bark, leaf, leaves, and wood—and other biological sourc ...ing (Korean blue) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indigofera Suffruticosa
''Indigofera suffruticosa'', commonly known as Guatemalan indigo, small-leaved indigo (Sierra Leone), West Indian indigo, wild indigo, and anil, is a flowering plant in the pea family, Fabaceae. ''Anil'' is native to the subtropical and tropical Americas, including the Southern United States, the Caribbean, Mexico, Central America, and South America as far south as northern Argentina. This species has been widely introduced to other parts of the world and today has a pantropical distribution. It is an erect branching shrub growing to tall with pinnate leaves, and is commonly found growing in dry, highly disturbed areas such as roadsides and fallow fields. ''Anil'' is commonly used as a source for indigo dye, and if mixed with Palygorskite clays, can produce Maya blue, a pigment used by the Mesoamerica Mesoamerica is a historical region and cultural area that begins in the southern part of North America and extends to the Pacific coast of Central America, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indigofera Arrecta
''Indigofera arrecta'', variously called the Bengal, Java, or Natal indigo, is a species of flowering plant in the family Fabaceae. It is native to SubSaharan Africa, the Arabian Peninsula, and Madagascar, and has been introduced to the Indian Subcontinent, Southeast Asia, some of the islands of Indonesia, the Philippines, and Queensland in Australia. Today it is occasionally used as a green manure, but historically was a major source of Indigo dye Indigo dye is an organic compound with a distinctive indigo, blue color. Indigo is a natural dye obtained from the leaves of some plants of the Indigofera#Uses, ''Indigofera'' genus, in particular ''Indigofera tinctoria''. Dye-bearing ''Indigofer ..., with under cultivation in India in 1896, declining to a few thousand hectares 60 years later. References {{Taxonbar, from=Q15431807 arrecta Flora of West Tropical Africa Flora of West-Central Tropical Africa Flora of Northeast Tropical Africa Flora of East Tropical Africa F ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japanese Indigo
''Persicaria tinctoria'' is a species of flowering plant in the buckwheat family. Common names include Chinese indigo, Japanese indigo and dyer's knotweed. It is native to Southern China and Vietnam, and has been introduced to other parts of China, as well as Germany, Japan, Korea, Tibet, North and South Caucasus, parts of the Russian Far-East, and Ukraine. The leaves are a source of indigo dye. It was already in use in the Western Zhou period ( 1045 BC – 771 BC), and was the most important blue dye in East Asia until the arrival of ''Indigofera'' from the south. See also * ''Indigofera tinctoria'' References Gallery Traditional natural dyeing (Korean blue) 2.jpg, Traditional natural dye Natural dyes are dyes or colorants derived from plants, invertebrates, or minerals. The majority of natural dyes are vegetable dyes from plant sources—roots, berry, berries, Bark (botany), bark, leaf, leaves, and wood—and other biological sourc ...ing (Korean blue) tinctoria ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indigofera Tinctoria
''Indigofera tinctoria'', also called true indigo, is a species of plant from the bean family that was one of the original sources of indigo dye. Description True indigo is a shrub high. It may be an annual plant, annual, biennial plant, biennial, or perennial, depending on the climate in which it is grown. It has light green pinnate leaves and sheafs of pink or violet flowers. The rotenoids deguelin, dehydrodeguelin, rotenol, rotenone, tephrosin and sumatrol can be found in ''I. tinctoria''. Distribution and habitat The native range of this species is tropical West Africa, Tanzania to South Africa and the Indian subcontinent to Mainland Southeast Asia. Agricultural use The plant is a legume, so it is rotated into fields to improve the soil in the same way that other legume crops such as alfalfa and beans are. The plant is also widely grown as a soil-improving groundcover. Dye Dye is obtained from the processing of the plant's leaves. They are soaked in water and fe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
