Hi, I am not sure whether you talk about key signatures or accidentals. In case of key signatures it is KeyCancellation (as Kieren said), in case of accidentals (which seems more likely as you refer to extraNatural), it is Accidental.
For this graphical object, there is no differentiation between sharps, flats naturals and extra naturals. To my knowledge you can only color all accidentals of a note at once. This shows all three objects in different colors: { \override Staff.Accidental.color = #blue \override Staff.KeySignature.color = #green \override Staff.KeyCancellation.color = #red \set Staff.extraNatural = ##t \key fis \major aeses4 as ais \key a \major a } Cheers, Joram _______________________________________________ lilypond-user mailing list lilypond-user@gnu.org https://lists.gnu.org/mailman/listinfo/lilypond-user