The colours allocated to the various fields of learning have been largely standardized in the United States by the Intercollegiate Bureau of Academic Costume, and accepted by the American Council on Education in its "Academic Costume Code." Some of the more common colours seen are that liberal arts is represented by white, science by golden yellow, medicine by green, law by purple, theology by scarlet, and philosophy (including all PhD degrees) by dark blue. A distinction is made in the code, which calls for a graduate to display the colour of the subject of the degree obtained, not the degree itself. For example, if a graduate is awarded a Bachelor of Arts (BA) degree specifically in business the trimming should be drab, representing commerce/accountancy/business, rather than white, representing the broader arts/letters/humanities; the same method is true of master's degrees and doctorates. However, in 1986, the American Council on Education updated the Code and added the following sentence clarifying the use of the colour dark blue for the Doctor of Philosophy degree, which is awarded in any number of fields: "In the case of the Doctor of Philosophy (PhD) degree, the dark blue colour is used to represent the mastery of the discipline of learning and scholarship in any field that is attested to by the awarding of the degree, and it is not intended to represent the field of philosophy."