Pitt Artist Pen Brush India ink pen
ultramarine
light indigo
Polychromos colour pencil
151 helioblue reddish
Metallics marker
colour ice ice blue
137 blue violet
145 light phthalo blue
Grip Finepen
0.4, helioblue reddish
Albrecht Dürer watercolour pencil
cobalt blue
skyblue
helioblue reddish
light phthalo blue
dark indigo