complexion

Ne ever is he wont on ought to feed / But todes and frogs, his pasture poysonous, / Which in his cold complexion doe breed / A filthy blood […]

a rugged complexion;  a sunburnt complexion

It was a little unfortunate that the fib unfibbed gave their consultations something the complexion of that close understanding which exists between penitent and confessor.

But the purely marginal jottings, done with no eye to the Memorandum Book, have a distinct complexion, and not only a distinct purpose, but none at all; this it is which imparts to them a value.

Second there is the level at which the energy or velocity components of each molecule are specified. He calls this a Komplexion, which we translate literally as complexion.