In making Venom, director Ruben Fleischer had a lot of discussions about saliva. Specifically, the amount of saliva that should be dripping off the wiseass symbiote's tongue. "Sometimes they'd go.
Of course, Venom is also well known for his long, slimy and prehensile tongue that can wrap around a person's entire head (few artists quite capture how creepy this looks than Gabriele Dell'Otto). Depends on the person coloring the issue, as you can see. Venom can change color all the way up to predator style near invisibility.
So it can be green if they feel like it. Go back to the first couple issues w Venom, Spiderman 300 I think. No tongue, square cut normal human teeth.
Creepy af. One of the most iconic and striking elements of the Venom symbiote's design has always been its elongated tongue, for which it has a genius use. What is the green stuff in Venom's mouth? Maker casually refers to the green saliva as the symbiote's waste product, which catches Eddie by surprise.
Since then, Erik was always given credit for Venom's crazy tongue but he consistently passed off the praise to Todd for the unique design. However, as he explained on Facebook recently - Todd's version of Venom's tongue was never that obnoxious and that it really was thanks to Erik's tweak of the design which gave Venom his iconic and creepily. Venom's iconic symbiote tongue gets a disturbing upgrade in Venom #27 with the introduction of a sentient symbiote tongue.
Toxin sacrifices himself to save his current host from a covert syndicate, leading him to become a helpless puddle of alien goo without a host. Venom saves Toxin by absorbing him and transforming him into a grotesque red tongue, adding a unique and terrifying element to. So it's not that far-fetched, that fleshy-colored mouth, tongue and teeth are just a mix of taking cues from the host and symbiotes own shapeshifting and flesh manipulation.
Teeth are often shown to flow with the symbiote and Eddie's head is revealed from Venom's mouth, so it's unlikely that it's actually his teeth shapeshifted. The recent Venom comic confirms that colors do matter in symbiote lore, with the implication that red symbiotes are stronger than black ones. The hierarchy of symbiote colors is now established, with red symbiotes being naturally stronger than black ones.
Venom is an iconic character in the Marve universe. It is an alien symbiote that has the ability to fuse with a human host, usually Eddie Brock. This fusion creates the formidable anti-hero Venom, endowed with superhuman powers, a long tongue and above all, phenomenal strength.