Ah, “silhouette” has a neat little backstory. It comes from French, literally meaning “outline.” The term was coined in the 18th century after a French finance minister, Étienne de Silhouette, whose name was attached to cheap, one‑color portrait prints. Those prints were cut‑out outlines of people, so the word stuck for any outline or shadow. So when you say it’s hauntingly fitting for night work, you’re echoing a word that already carries that silhouette‑like mystery.