This is the Warhammer Base Colour: Night Lords Blue Paint 12ml [21-42]

Citadel Base paints are high-quality acrylic paints specially formulated for base coating your Citadel miniatures quickly and easily. They are designed to give a smooth matte finish over black or white undercoats with a single layer.

All Citadel paints are non-toxic, water-based acrylic that are designed for use on plastic, metal, and resin Citadel miniatures. One pot contains 12ml of base paint.