Rank in Judo judo association. For a rank to be recognized, it must be registered with the national judo organization or the Kōdōkan. In Japan, the use of belt colors is related to the age of the student. Some clubs will only have black and white, others will include a brown belt for advanced kyū grades and at the elementary school level it is common to see a green belt for intermediate levels. In Europe the belt system is white, yellow, orange, green, blue, brown and black for both senior and junior practitioners. Judokas who have attained the 6th Dan may also use
Orange (colour) jackfruit tree. In Europe and America orange and yellow are the colours most associated with amusement, frivolity and entertainment. In this regard, orange is the exact opposite of its complementary colour, blue, the colour of calm and reflection. Mythological paintings traditionally showed Bacchus (known in Greek mythology as Dionysus), the god of wine, ritual madness and ecstasy, dressed in orange. Clowns have long worn orange wigs. Toulouse-Lautrec used a palette of yellow, black and orange in his posters of Paris cafes and theatres, and Henri Matisse used an orange, yellow and red palette in his painting, the "Joy of Living".