bigbadjackal:

“In Egyptian the word for ‘colour’ (iwn) also means ‘character’. This suggests a belief that colours are intrinsic, and indeed that there is a whole philosophy of colour correspondences to be explicated from pharaonic sources.”

DuQuesne, T., 1996. Black and Gold God. p.15

And this right here is part of why I expend so much energy on correcting the misconception that Wepwawet is grey or white. His black colouration is part of his very character.