What is indigo?
Q: What is indigo?
A: Indigo is a shade of blue, specifically purplish blue or dark blue.
Q: Who named and defined indigo as a spectrum color?
A: Isaac Newton named and defined indigo as a spectrum color when he divided up the spectrum into the seven colors of the rainbow.
Q: What is the spectral range of indigo?
A: The spectral range of indigo is between 450 and 420 nanometers.
Q: Where did the name of the color indigo come from?
A: The name of the color indigo originally came from the indigo plant.
Q: What is indigo dye used for?
A: Indigo dye is used to dye cloth, specifically denim cloth which is used to make what are called blue jeans.
Q: Where did the indigo plant originally come from?
A: The indigo plant originally came from the nation of India.
Q: What is the Ancient Greek language word for the dye?
A: The Ancient Greek language word for the dye is indikon.
