Is there a relation between music chords and visible light palette Ok I have no idea if this is the right stackexchange so if you know who would know please tell me :)
In music there are groups of notes that, when played togheter, are basis to harmony. Since both sounds and light are waves (at least light acts like one). Is there a relation between the proportion of wavelength in an arbitrary chord and light color palette.
ex, if C,E,G (the musical notes) are all 1.3 times shorter then the previous note. Could we extrapolate the proportion to visible light and make nice colorpalette?
Has this been done before ?
Edit: I found the formula used to calculate note frequency
f(n)=440*2^((n-49)/12)
 A: As a physics & music major I've thought about this a lot.
Our visible light range doesn't even cover one octave (400nm - 700nm), but you can see how 400nm light (violet) almost completes the octave from 700nm light (red). Perhaps if we could see 350nm light we'd perceive it similarly to red? I think there's an evolutionary advantage to our eyes not "completing the octave" because if we did we could confuse certain types of materials (hard to distinguish 350nm red from 700nm red).
Our eyes have incredible direction resolution (we can identify where different colors are coming from extremely well), but poor superposition resolution (we see two colors together as one mixed color). Our ears have fuzzy direction resolution (we can't use our hearing to get around) but great superposition resolution (identifying instruments in an orchestra, etc.). 
So I think that's why we find certain superpositions of sound waves pleasant to our ears (music), but different spatial placements of light wave frequencies pleasant to our eyes (paintings). Think of a song as a painting that instead of having light waves mapped over two spatial dimensions, has sound waves mapped over one spatial dimension and one time dimension.
A: Sadly, there is no relation. While at least some chords have a nice physical basis - octaves are literally harmonics of each other - human perception of color has very little connection to the physics of light. Color is cyclical: we see high-frequency blues as near low-frequency reds with mixed-frequency purples in between, so there is no equivalent of an octave at all. The closest equivalent to a fifth would be something like complementary colors, which are actually quite "dissonant" instead of harmonious.
Perceived color is also three-dimensional, where pitch is one-dimensional, and there are multiple different color spaces (RGB vs HSV, for example) that arrange colors in very different ways. 
If you want to create a palettes that will look nice to folks with color vision, there is plenty of graphic design advice out there. Unfortunately, if you want to understand intuitively what makes such a palette look good, an analogy to sound can't help very much.
