Polychromos colour pencil
120 ultramarine
144 cobalt blue-greenish
137 blue violet
146 skyblue
143 cobalt blue
157 dark indigo
110 phthalo blue
140 light ultramarine
145 light phthalo blue
152 middle phthalo blue
151 helioblue reddish
247 indanthrene blue
246 Prussian blue