Albrecht Dürer watercolour pencil
dark indigo
Albrecht Dürer Magnus watercolour pencil
helioblue reddish
phthalo blue
ultramarine
light ultramarine
Goldfaber Aqua watercolour pencil
cobalt blue
light blue
Prussian blue
indanthrene blue
light phthalo blue
skyblue
cobalt blue-greenish
middle phthalo blue