The Vallejo Model Air colors of acrylic paints are specially developed for the airbrush technique. The paint contains a new acrylic resin with properties that were not possible in acrylic water-based paints until now. The excellent resistance, hardness and covering power of Model Air is superior to any existing water-soluble airbrush Acrylcolor.
Great Tips for processing and application can be found at http://www.acrylicosvallejo.com/
The color that is seen in the picture is not necessarily very meaningful. Better determined by the product name.