Sunday ing will be giving a musical lesson on Indigo.
According to our friends at Wikipedia, Indigio (or spectral indigo) is the color on the spectrum between 440 and 420 nanometres in wavelength, placing it between blue and violet.
According to our friends at Wikipedia, Indigio (or spectral indigo) is the color on the spectrum between 440 and 420 nanometres in wavelength, placing it between blue and violet.