PianoRollHeader::Color PianoRollHeader::white_shade_light = PianoRollHeader::Color(0.95f, 0.95f, 0.95f);
PianoRollHeader::Color PianoRollHeader::white_shade_dark = PianoRollHeader::Color(0.56f, 0.56f, 0.56f);
PianoRollHeader::Color PianoRollHeader::black = PianoRollHeader::Color(0.24f, 0.24f, 0.24f);
PianoRollHeader::Color PianoRollHeader::white_shade_light = PianoRollHeader::Color(0.95f, 0.95f, 0.95f);
PianoRollHeader::Color PianoRollHeader::white_shade_dark = PianoRollHeader::Color(0.56f, 0.56f, 0.56f);
PianoRollHeader::Color PianoRollHeader::black = PianoRollHeader::Color(0.24f, 0.24f, 0.24f);