The Colour of Sound


Fundamental Note
Note Bias
Pitch Standard
A4 =  Hz  
  Temperature Relative
Humidity (%)
Note played at: °F %
Colour of Light that is Resonant with the Pitch Above

The resonant colour of light that is 41 octaves above an F4 at standard pitch A4=440 has a frequency of 767.96 THz. This colour has a wavelength of 390.37 nm. The equivalent RGB colours (shown above) that approximate this colour of light are #57009e.

The frequency of an F4 at standard pitch A4=440 is 349.23 Hz.

At a temperature of 22.22°C, the speed of sound is 345.31 m/sec. Under these conditions, an F4 at standard pitch A4=440 has a wavelength of 98.88 cm.


This calculator lets you specify a note and observe the colour that is consonant with that note. “Consonant" means that the colour has a frequency that is some number of octaves above the frequency of the sound.

Some things to note:

Colour Frequency Wavelength
violet 668–789 THz 380–450 nm
blue 631–668 THz 450–475 nm
cyan 606–630 THz 476–495 nm
green 526–606 THz 495–570 nm
yellow 508–526 THz 570–590 nm
orange 484–508 THz 590–620 nm
red 400–484 THz 620–750 nm