I love this! I have been trying to figure out sensible colouring for my Janko-layout Chromatone keyboard (https://chromatone.jp/chromatone/index.html https://c

I love this! I have been trying to figure out sensible colouring for my Janko-layout Chromatone keyboard (https://chromatone.jp/chromatone/index.html https://chromatone.jp/chromatone/index.html, no longer available). All its keys are white. The original Janko keyboards used the same black and white as traditional piano keyboards, like this: https://imgur.com/a/OUAsobE https://imgur.com/a/OUAsobE (A C major scale is shown with bold key outlines in all these pictures.) But some people have used a 3-colour layout like this: https://imgur.com/a/ya07LGU https://imgur.com/a/ya07LGU Still, that leaves quite a bit of ambiguity, as different notes are the same colour, and it's hard to orient yourself. So I tried a spectrum-organised 12-colour layout: https://imgur.com/a/Is9sQiA https://imgur.com/a/Is9sQiA But with so many colours, there are very similar ones close together. So I tried looking at 6-colour layouts, and at putting tactile dots on some keys to both disambiguate which note it is (since each colour is used for two notes), and also allow for playing by feel, so you can better know where you are: https://imgur.com/a/sFzEH0G https://imgur.com/a/sFzEH0G It's not clear where the best locations for the dots are (they'll be little rubber feet, and I have found two different shapes for better touch information). The 12-colour pattern in this article, using the circle of 5ths, avoids the problem of similar colours close together: https://imgur.com/a/0RN7dqY https://imgur.com/a/0RN7dqY I would still like some dots somewhere on it for tactile playing. With this layout, each major scale gets its own distinctive colour scheme: https://imgur.com/a/6FhrAcK https://imgur.com/a/6FhrAcK This makes accidentals really obvious on the piano roll pictures in this article.