The proprietary liquid ink technology in Karin Brushmarker PRO Markers maintains the ink's color intensity down to the last drop. These colors can be mixed and lightened to achieve tonal transitions in your artwork. For drawing, illustration, and design. Flexible, durable nylon tips. - Karin Brushmarkers Pro Markers and Sets - Set of 12, Sky ColorsKarin Brushmarker Pro, 12 SKY COLORS - Includes Lilac, Plum, Violet Blue, Indigo Blue, Sapphire Blue, Royal Blue, Egyptian Blue, Cyan, Sky Blue, Arctic Blue, Turquoise, and Cool Aqua.