Inland batik, "batik pedalaman" or "batik kraton" (Javanese court batik) is the oldest form of batik tradition known in Java. Inland batik has earthy colour such as black, indigo, brown, and "sogan" (brown-yellow colour made from the tree "Peltophorum pterocarpum"), sometimes against a white background, with symbolic patterns that are mostly free from outside influence. Certain patterns are worn and preserved by the royal courts, while others are worn on specific occasions. At a Javanese wedding for example, the bride wears specific patterns at each stage of the ceremony. Noted inland batiks are produced in Solo and Jogjakarta, cities traditionally regarded as the centre of Javanese culture. "Batik Solo" typically has "sogan" background and is preserved by the Susuhunan and Mangkunegaran Court. "Batik Jogja" typically has white background and is preserved by the Yogyakarta Sultanate and Pakualaman Court.