Pitt Artist Pen Metallic 1.5 India ink pen
blue metallic
Pitt Artist Pen Brush India ink pen
skyblue
Grip Finepen
0.4, helioblue reddish
ultramarine
dark indigo
indanthrene blue
ice blue
cobalt blue
phthalo blue
Albrecht Dürer watercolour pencil
Prussian blue
Polychromos colour pencil
120 ultramarine
144 cobalt blue-greenish
146 skyblue
151 helioblue reddish
143 cobalt blue
157 dark indigo
110 phthalo blue
140 light ultramarine
145 light phthalo blue
247 indanthrene blue
246 Prussian blue
