Get simple, seamless color gradations — all in one marker pen — with Chameleon Pen Sets! These professional-quality markers let you change the color of the ink right on the nib, so you can achieve a variety of tones for highlighting, shading, blending, or for adding depth, dimension, and texture. - Chameleon Pen Set - Primary Tones, Set of 5Chameleon Color Tones Pens, PRIMRY TONES SET 5CT - This set includes one each of Grass Green, Deep Black, Royal Blue, Summer Sun, and Crimson Red.