Talens Ecoline Brush Pen Set of 30 Additional is based on dyes and Gum Arabic. The colors of Talens Ecoline are astonishingly bright and brilliant. Easily decrease the color intensity through thinning with water or with a blender. Includes pastel ylw, sand ylw, apricot, gold ochre, saffron ylw, pastel rose, lt rose, fuchsia, pastel violet, pastel red, pastel blue, sky blue lt, ultramarine lt, bluish grn, turquoise grn, fir green, indigo, pastel grn, spring grn, grass grn, bronze grn, pink beige, beige, sepia lt, wm grey lt, cd grey lt, grey, dp grey, mahogany, and sepia dp.