gris-de-lin

Ariste, tearing his curled hair, and the _gris-de-lin clair_ coat, and, doubtless, the Présidente's "red rose chain," cursing also terribly, goes off to write a book against the age, and to prove that nobody is wise but himself.

A History of the French Novel, Vol. 1 From the Beginning to 1800 George Saintsbury 1889