Here is a detail of blue nocturne (e). The ink and painted line reflects the influence of Goltzius's beautiful lines...drawn or etched. For me, it is unusual to use black ink or black, and I think, it gives the color a luminous or "stained glass" quality. The horizonal lines also produce a sense of movement.
(Hendrick Goltzius, Dutch (active Haarlem) - Sine Cerere et Libero friget Venus (Without Ceres and Bacchus, Venus Would Freeze) Created: c. 1600-1603) This is my inspiration for the new painting I am working on: blue nocturne (e). It is not the image content, but the linear quality of Goltzius's drawings and engravings.