Watercolor painting is a technique that involves using water-soluble pigments that are mixed with a binder, usually gum arabic, and water. It is known for its vibrant colors and the ability to create smooth gradients. A 'watercolor doll color picture' would refer to a depiction of a doll, such as a plush or porcelain figure, rendered in watercolor, showcasing the delicate and translucent qualities of this medium. This type of artwork can be found in various styles, from realistic to abstract, and is often used in illustration and fine art.