Citadel Drakenhof Nightshade Shade is a very thin paint designed to follow in the details of the miniatures and accentuate them. These types of paints are also called washes. They are invaluable to any painter. Shake Drakenhof Nightshade well before use.
Using a brush, remove a small amount of blue paint from the jar and onto a palette. Apply the paint to the model with a slightly larger brush, so that a lot of paint can be applied. To do this, place the tip of the brush on the figure where the details can be found and let the blue paint run into it. The paint will follow the shape of the details and give a natural "shadow". Play with the amount of Drakenhof Nightshade you apply so that it is not too much (or too little). You'll get the hang of it soon enough.
The color of Citadel Drakenhof Nightshade (24-17) is similar to: The Army Painter Blue Tone Ink (WP1139); Old Citadel Asurmen Blue Wash; Vallejo Game Color Blue Shade Wash (73207); Instar Blue.