Severance built the Lumon "severed floor" as a retro-futuristic corporate uncanny valley: an endless office of putrid kelly-green wall-to-wall carpet under cold fluorescent light, stark white linoleum corridors, and green-on-black CRT terminals.

Production designer Jeremy Hindle chose the green deliberately — "green is the most common color to your eye" — to make the space read like a childlike, eerie playground. This system distills that sterile institutional dread into a usable palette of dull office greens, corporate blue, and phosphor terminal glow.