Pitt Artist Pen Brush India ink pen
ultramarine
dark indigo
indanthrene blue
ice blue
cobalt blue
light indigo
phthalo blue
skyblue
Goldfaber Aqua watercolour pencil
light ultramarine
blue violet
helioblue reddish
light blue
Polychromos colour pencil
120 ultramarine
144 cobalt blue-greenish
137 blue violet
146 skyblue
151 helioblue reddish
143 cobalt blue
157 dark indigo
110 phthalo blue
140 light ultramarine
145 light phthalo blue