Pentel Color Brush Pens. Used only for test writing and then stored. These color brush pens combine colored ink and a brush tip, allowing for the soft lines characteristic of a brush. They have vibrant, fresh colors that allow for watercolor effects, and are suitable not only for writing but also for watercolor painting and illustrations. The brush tip uses high-quality synthetic bristles, so it doesn't fray and is highly durable. Red, Blue, Green, Lemon Yellow Brown, Orange, Pink, Sky Blue Light Green, Turquoise, Olive Green Pale Orange, Steel Blue, Gray Yellow Orange, Sepia, Purple