Main Difference
The main difference between Indigo and Purple is that the Indigo is a deep and bright shade of blue and Purple is a range of colors with the hues between blue and red
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Indigo
Indigo is a deep and rich color close to the color wheel blue (a primary color in the RGB color space), as well as to some variants of ultramarine. It is traditionally regarded as a color in the visible spectrum, as well as one of the seven colors of the rainbow: the color between violet and blue; however, sources differ as to its actual position in the electromagnetic spectrum.
The color indigo is named after the indigo dye derived from the plant Indigofera tinctoria and related species.
The first known recorded use of indigo as a color name in English was in 1289.
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Purple
Purple is a color intermediate between blue and red. It is similar to violet, but unlike violet, which is a spectral color with its own wavelength on the visible spectrum of light, purple is a composite color made by combining red and blue. According to surveys in Europe and the U.S., purple is the color most often associated with royalty, magic, mystery, and piety. When combined with pink, it is associated with eroticism, femininity, and seduction.Purple was the color worn by Roman magistrates; it became the imperial color worn by the rulers of the Byzantine Empire and the Holy Roman Empire, and later by Roman Catholic bishops. Similarly in Japan, the color is traditionally associated with the Emperor and aristocracy. The complementary color of purple is yellow.
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Indigo (noun)
A purplish-blue colour
“color panel|00416A”
“2=4B0082”
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Indigo (noun)
An indigo-colored dye obtained from certain plants (the indigo plant or woad), or a similar synthetic dye.
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Indigo (noun)
An indigo plant, such as from species in genera Indigofera, Amorpha (false indigo), Baptisia (wild indigo), and ver=161009 and Dalea (indigo bush).
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Indigo (adjective)
having a deep purplish-blue colour
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Purple (noun)
A colour/color that is a dark blend of red and blue; dark magenta.
“color panel|800080”
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Purple (noun)
Cloth, or a garment, dyed a purple colour; especially, a purple robe, worn as an emblem of rank or authority; specifically, the purple robe or mantle worn by Ancient Roman emperors as the emblem of imperial dignity.
“to put on the imperial purple”
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Purple (noun)
Imperial power, because the colour purple was worn by emperors and kings.
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Purple (noun)
Any of various species of mollusks from which Tyrian purple dye was obtained, especially the common dog whelk.
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Purple (noun)
The purple haze cultivar of cannabis in the kush family, either pure or mixed with others, or by extension any variety of smoked marijuana.
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Purple (noun)
Purpura.
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Purple (noun)
Earcockle, a disease of wheat.
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Purple (noun)
Any of the species of large butterflies, usually marked with purple or blue, of the genus ver=170608 (formerly ver=170608).
“the banded purple”
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Purple (noun)
A cardinalate.
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Purple (adjective)
Having a colour/color that is a dark blend of red and blue.
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Purple (adjective)
Not predominantly red or blue, but having a mixture of Democrat and Republican support, as in purple state, purple city.
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Purple (adjective)
Mixed between social democrats and liberals.
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Purple (adjective)
Imperial; regal.
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Purple (adjective)
Blood-red; bloody.
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Purple (adjective)
Extravagantly ornate, like purple prose.
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Purple (verb)
To turn purple in colour.
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Purple (verb)
To dye purple.
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Purple (verb)
To clothe in purple.
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Purple (noun)
a colour intermediate between red and blue
“the painting was mostly in shades of blue and purple”
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Purple (noun)
purple clothing or material.
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Purple (noun)
a crimson dye obtained from some molluscs, formerly used for fabric worn by an emperor or senior magistrate in ancient Rome or Byzantium.
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Purple (noun)
(in ancient Rome or Byzantium) clothing made from fabric dyed with Tyrian purple.
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Purple (noun)
(in ancient Rome) a position of rank, authority, or privilege
“he was too young to assume the purple”
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Purple (noun)
the scarlet official dress of a cardinal.
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Purple (adjective)
of a colour intermediate between red and blue
“a faded purple T-shirt”
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Purple (verb)
make or become purple in colour
“Edmund’s cheeks purpled”
“the neon was purpling the horizon above the highway”