Aside from the fact that the papal colors are white and yellow (or gold – the two terms are heraldically synonymous), nothing else is known about the history of the colors selected by the Pontifical College Josephinum. The shade of yellow is a golden yellow.
The Intercollegiate Bureau of Academic Costume (IBAC) assigned a hood lining to Pontifical College Josephinum at some point after World War Two. The first IBAC description of the hood lining assigned to the college was in an academic hood list published in 1972 where it was said to be “white over yellow”, which is typically how the Bureau described hood lining colors divided per chevron, per reversed chevron, or per bar.
However, this may have been an erroneous description, as a list from two years earlier, compiled by Kevin Sheard for Academic Dress and Insignia of the World (1970), described the college’s lining as having its colors divided per pale: white on the left and yellow on the right. This hood lining arrangement is preferable, as it is a mirror image of the papal flag.