Jo Sonja's colors are flow formula acrylics that offer the look and feel of a traditional gouache. The colors are highly opaque, with excellent covering power and a beautiful velvet matte finish. These sets are perfect for opalescent and interference techniques. Creative Sampler Set — This set contains 12 colors in 20 ml tubes, including one each of Titanium White, Yellow Light, Yellow Orange, Naphthol Red Light, Naphthol Crimson, Amethyst, Diox Purple, Blue Violet, Aqua, Pine Green, Yellow Green, and Carbon Black.