Color and the Chromatic Scale
octave nm
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9 43 A 1240 241.89255811072 THz -
10 43 A# 1170 A43 is exactly this -
11 __ B43 1105 as A4 AKA A440, the -
12/0 C44 1040 49th piano key is -
1 44 C# 985 exactly 440 Hz. -
2 44 D 930 -
3 44 D# 875 ----------------------------
4 44 E 825- ----------------- + -------
5 44 F 780- infrared + Fa -
6 44 ____ F# 735- + - -
{ 7 44 G }{ 695+ ----------------- + Sol }
{ 8 44 G# }{ 655+ red + - }
{ 9 44 A }{ 620+ orange + La }
{ 10 44 A# }{ 585+ yellow + - }
{ 11 __ B44 }{ 550+ green + Si }
{ 12/0 C45 }{ 520+ green and cyan + Do }
{ 1 45 C# }{ 490+ blue + - }
{ 2 45 D }{ 465+ + Re }
{ 3 45 D# }{ 440+ + - }
{ 4 45 E }{ 415+ violet + Mi }
{ 5 45 F }{ 390+ + Fa }
{ 6 45 ____ F# }{ 370+ ----------------- + - }
7 45 G 350 -- ultraviolet -------------
8 45 G# 330 -
9 45 A 310 967.57023244288 THz -
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Rainbows are pretty. The painter mixes colors. The musician mixes sounds. The CIE (AKA the International Commission on Illumination, the international authority on light, illumination, color, and color spaces) mixes parts of the rainbow. Their CIE 1931 color space gives coordinates of selections of the visible spectrum (360-830nm at increments of 5 nanometers). This chart shows the correlation between that and the chromatic scale.
The idea is that all perceived color is some combination of colors of the rainbow and all of those colors correspond to certain sounds that we can only hear with our eyes.