A kind of deep blue, one of the seven prismatic colors.
A blue dyestuff obtained from several plants belonging to very different genera and orders, such as, the woad, Isatis tinctoria (family Cruciferae), Indigofera suffroticosa, Indigofera tinctoria (family Leguminosae), Indigofera Anil, Nereum tinctorium, Polygonum tinctorium Ait. (family Polygonaceae), etc.; called also natural indigo. It is a dark blue earthy substance, tasteless and odorless, with a copper-violet luster when rubbed. Indigo does not exist in the plants as such, but is obtained by decomposition of the glycoside indican.
( genus: Indigofera) A plant from which comes indigo blue dye. Also the colour indigo, a dark purplish tint.
blue dye, C16H10N2O2, obtained from certain plants, esp. a plant ( Indigofera tinctoria) native to India, or made synthetically, usually from aniline
(in•di•go) n. – a plant used to make blue dye; historically grown on plantations.
Originally a natural blue vat dye extracted from plants especially the Indigofera tinctoria plant. Most indigo dyes today are synthetic. They are frequently used on dungarees and denims.
a type of blue dyestuff originally obtained from the indigo plant but now produced synthetically. Used for denim.
A plant that yields a blue vat dye.
a blue dye obtained from plants or made synthetically
deciduous subshrub of southeastern Asia having pinnate leaves and clusters of red or purple flowers; a source of indigo dye
Natural plant dye for blue borders.
extract prepared from cultivated plants of Indigofera Tinctoria. Indigo can give the clearest blues of all values from pale sky blue to the deepest darkest navy.
Any of various shrubs or herbs in the pea family with odd-pinnate leaves and usually red or purple flowers. A yellow juice from the plant oxidixes to blue when exposed to air. Indigo was chemically synthesized in 1880.
The blue dyestuff found in denim jeans was first obtained from the "Indigofera tinctoria" plant. Today the chemical is synthetically manufactured.
Once harvested from plants, most indigo is now synthesized from chemicals. It is used to dye various cellulose based fibers. Pure indigo can produce deep, brilliant blues that cannot be duplicated with any other dye.
A shrub or herb in the pea family whose yellow juice oxidizes to blue when it comes into contact with air. Indigo became chemically synthesized in 1880.
Any of various shrubs or herbs of the genus Indigofera in the pea family, having odd-pinnate leaves and usually red or purple flowers in axillary racemes. A blue dye obtained from these plants or produced synthetically.
Different blue shaded dyes obtained from the leaves of the indigo plant.
A blue dye obtained from the indigo plant.
A blue vegetable dye derived form a member of the pea family,. A yellow juice from the plant oxidizes to blue upon exposure to air. Indigo was chemically synthesized in 1880.
A deep blue-violet dye, commonly used in denim.
Indigo (or spectral indigo) is the color on the spectrum between 440 and 420 nanometres in wavelength, placing it between blue and violet. Indigo and violet are different from purple (as defined by chromaticians [color scientists]) which cannot be seen on the electromagnetic spectrum and which can be achieved using additive primary colors by mixing blue light with a red light.