Color it is viewed, may alter its perception considerably; for example, a low-intensity orange-yellow is brown, and a low-intensity yellow-green is olive green. The color of an object depends on both the physics of the object in its environment and the characteristics of the perceiving eye and brain. Physically, objects can be said to have the color of the light leaving their surfaces, which normally depends on the spectrum of the incident illumination and the reflectance properties of the surface, as well as potentially on the angles of illumination and viewing. Some objects not only reflect light, but also transmit light
Judo in Canada syllabus calls "6th+ "kyū""). The first five "dan" grades ("shodan" to "godan") are represented by a black belt. Judoka ranked sixth to eighth "dan" may wear a red and white belt, and those ranked ninth or tenth "dan" may wear a solid red belt, but this is not required and the black belt remains the standard for all "dan" grades. In the past women's belts would include a white stripe in the centre of the length of the belt to differentiate them from men, but this is much less common now. Promotions are regulated by Judo Canada using guidelines set