Ink color: Black, Red, Blue, Green, Lemon yellow, Brown, Orange, Pink, Sky blue, Light green, Turquoise, Olive green, Pale orange, Steel blue, Gray, Yellow orange, Sepia, Purple, (Total 18 colors). Ink cartridge type. Aqueous dye brush pen 18 color set. It's most suitable to draw an illustration and a painting! A technique of a gradation and shading can be used, and it becomes fun that it's drawn.