Subject: According to Wikipedia, it used to be spelled "Iron Brew".
Author:
Posted on: 2014-01-09 00:52:00 UTC

So maybe the bright orange color was linked to that, related to the orange colors of rust and other ferrous materials. Wait, no, that would explain the name in relation to the drink, and not why the drink itself was orange originally.

(after further searching) Oh. Synthetic colorings of "Sunset Yellow FCF" and "Ponceau 4R" combine to make the drink's orange color. Well, that was anti-climactic.

...

SCIENCE!

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