Quartet Alphacolor® Soft Square Pastels Alphacolor® Soft Square Pastels Perfect for paper and cloth or brushed-on ceramics, 2-3/4 x 7/16 diameter, and can be stored in a reusable plastic tray with lift lid. CP Approved nontoxic. 24-Color Pack Builds on the colors in the 12-color assortment which includes black, blue, brown, green, light blue, orange, peach, red, violet, white, yellow, and yellow-green.