\override Stem.length = #0
% Add color to text markups in top staff
g4_\( fis^(_\markup { \with-color #blue \tiny N } g)\)
a^(^\markup { \with-color #blue \tiny P } b2)
b4^(^\markup { \with-color #blue \tiny P }
\stemUp
\override Stem.length = #0
% Add color to text markups in top staff
g4_\( fis^(_\markup { \with-color #blue \tiny N } g)\)
a^(^\markup { \with-color #blue \tiny P } b2)
b4^(^\markup { \with-color #blue \tiny P }
\stemUp