indigo blue

indigo blue

The artist mixes indigo blue paint on her palette.

Definition

Noun - A colour: "indigo blue" is a deep blue-violet colour, often described as the colour between blue and violet in the visible spectrum. It is one of the seven colours of the rainbow. - A dye: "indigo blue" also refers to a natural or synthetic dye that produces this deep blue-violet colour, historically obtained from plants of the genus Indigofera.

Usage Examples
  • As a colour:
    • The artist mixed blue and violet to create a shade of indigo blue for the night sky. (A deep blue-violet colour used in painting.)
  • As a dye:
    • The traditional fabric was dyed using indigo blue extracted from plants. (The dye used to colour the fabric.)
Advanced Usage
  • "to be dyed indigo blue": to be coloured with indigo dye.
    • The denim jeans were dyed indigo blue to achieve their classic look. (The jeans were coloured using indigo dye.)
  • "indigo blue in the spectrum": referring to the specific wavelength of light in the rainbow.
    • In a rainbow, indigo blue appears between blue and violet. (The colour occupies a specific position in the visible light spectrum.)
Variants and Related Words
  • Indigo (n/adj): the base form of the colour or dye; "indigo blue" is a specific shade of indigo.
    • She wore a dress of pure indigo. (A garment coloured with indigo dye.)
  • Indigotin (n): the chemical compound responsible for the colour in indigo dye.
    • Indigotin is the active pigment in indigo blue. (The chemical that gives the colour.)
Synonyms
  • Deep blue: a general term for a dark blue colour.
  • Violet-blue: a colour that blends blue and violet tones.
  • Royal blue: a brighter, more vivid blue, though not identical to indigo blue.
Related Idioms
  • "True indigo": a phrase used to describe something authentic or original, derived from the historical importance of indigo dye.
    • This painting uses true indigo blue, not a synthetic substitute. (Authentic, natural indigo dye.)

Note: "indigo blue" is primarily a noun or adjective describing a colour or dye. It does not commonly appear in phrasal verbs or idioms beyond those listed.