Okay, here's a question...

[vr_trakowski]

Human blood uses iron to transport oxygen molecules.  Oxygen-carrying blood is red--it's oxidized, after a fashion...rusty.  Fine. 

Vulcan blood (I know, work with me here) uses copper to transport oxygen.  Oxygenated copper turns green (or greeny-blue).  So... 

Is unoxygenated Vulcan blood...red? 

Comments

[inalichenmanner.livejournal.com]

It's copper! :P

(Now, whether it's the shiny reddish color of polished copper, or the greenish patina of aged copper is probably your choice.)

[vr-trakowski.livejournal.com]

Yes, exactly! A question for the ages.