Applies wherever a note is simply named. Where the spelling is fixed by the music — the chords of a key, the notes of a triad — it stays as written.
The default already covers deuteranopia and protanopia; blue–yellow covers tritanopia, and high contrast drops colour altogether. Every dot is labelled and roots are filled, so the board never relies on colour alone.
Fret number, 1 to 24. Leave it empty for no capo. Notes behind the capo are hidden, since you can’t play them.
Tap any note on a fretboard to hear it.
Tap what you are playing and find out what it is called.
Tap a fret to add it, tap again to remove it. The lowest note you pick is treated as the bass.
Nothing in the library is built from these notes.
Nothing is made of exactly these notes, so these are the chords they belong to. Guitar voicings leave notes out all the time — the fifth, which says the least, and the root when someone else has it. In grey: what you are not playing.
Nothing in the library contains all of these notes.