Pitt Artist Pen Brush India ink pen
ultramarine
ice blue
cobalt blue
light indigo
phthalo blue
Polychromos colour pencil
151 helioblue reddish
247 indanthrene blue
246 Prussian blue
Goldfaber Aqua watercolour pencil
light ultramarine
blue violet
Albrecht Dürer watercolour pencil
skyblue
dark indigo
light phthalo blue
cobalt blue-greenish
Metallics marker
colour ice ice blue
Prussian blue
indanthrene blue
Goldfaber colour pencil