adjective/fœj.mɔʁt/
of the colour of dying leaves: russet, feuillemorte
“Elle avait eu la sottise, dans sa hâte, de choisir un costume de soie feuille-morte à longs volants de dentelles blanches.” — In her haste, she had been foolish enough to choose a russet silk dress with long flounces of white lace.
From feuille (“leaf”) + morte (“dead”).