(c)Paysage de la Musique, 2011
Most of music scores are black-and-white printed.
A Japanese engineer and piano player invented a new simple musical notation --Color5-- which paints notehead with 5 colors, not using accidentals.
It makes complicated score simply and compact.
Five colors, representing accidentals, are orange(double sharp), red(sharp), black(natural), blue(flat) and cyan(double flat).
Another feature is "Narrow Grand Staff".
At the degree of tone-pitch, only a ledger line between two staves. You can understand pitch at a glance.
Ottaviano Petrucci, an Italian Renaissance printer, produced some of the first impressions of music with movable type in 1501.
500 years passed...
"Why, black-and-white printed scores?"