The Arcane Fedora is being shown as a Robux-exclusive item, not a free color- change item, so you generally can’t “turn it black” in the game itself.

What you can do

  • Buy or equip a black fedora-style item instead, such as a black catalog fedora if you want the look.
  • Use avatar customization to pair the Arcane Fedora with darker clothing, skin tones, or accessories for a black-themed outfit.
  • If you saw a video claiming a black version, it may be a separate item or a limited add-on rather than a recolor of the Arcane Fedora.

Quick check

The item pages and recent videos point to the Arcane Fedora being its own catalog item, while black alternatives are separate Roblox accessories.

TL;DR

You usually can’t recolor the Arcane Fedora to black directly; the practical option is to use a black fedora item or build a black-themed avatar around it.