I tried a customisation of a keyboard with per-key RGB LEDs, which would light up the key if it was defined on that layer. As neat as it sounded, I don't think

I tried a customisation of a keyboard with per-key RGB LEDs, which would light up the key if it was defined on that layer. As neat as it sounded, I don't think it was very useful. Once you're use to your custom keyboard layers, you don't really look down at the keyboard.