Venom #8 confirms symbiote colors matter, with red symbiotes being stronger than black. Red symbiotes signify a perfect bond with a host, potentially explaining their increased strength. The hierarchy of symbiote colors remains mostly unexplained, with green, yellow, and purple symbiotes' strengths unknown.
Introduction: The Spectrum of Venom The Marvel Comics character Venom is renowned for his incredible strength, resilience, and symbiotic abilities. The Venom symbiote has bonded with various hosts throughout its history, often exhibiting different color variations, from the classic black to red, purple, white, and even green. There is no definitive evidence that color exactly determines a symbiote's strength and capabilities.
For example, Carnage is red and considered extremely dangerous and volatile, whereas the more blue and noble symbiote Venom has similar overall power levels. However, some general trends emerge when examining symbiote colors: Red and Black. Similar to how Venom was "attracted" to spiderman but didn't actually know him, but was teleported there due to spiderman being Peter Parker was part of the information in the hive mind.
Back on track, Venom has faced off against Carnage multiple times across the multiverse. So that is more than likely how he knew red ones are dangerous. The Symbiote backstory extends billions of years before its first bond with Spider-Man, revealing a rich history.
Venom, although the most famous Symbiote, is not the most powerful; other Symbiotes such as Toxin and Anti-Venom surpass him in strength. Tthe most powerful Symbiote is a literal god of darkness, with the ability to destroy Celestials. The color of snake venom has no direct correlation with its toxicity, potency, or danger level.
A venom's lethality and its specific effects are determined by its precise biochemical composition, which includes the types and concentrations of various toxins, enzymes, and proteins present. Venom has demonstrated strength ranging from only slightly greater than Spider-Man's to being capable of trading blows with high. Venom enhances Spider-Man's abilities, giving him more strength, webbing, and swinging options.
Color isn't significant for power levels. Assuming that's just for the movie. And as for hierarchy, a good break down is spidey is 100 times stronger than a human.
Then venom is ten times stronger then spidey. Carnage over venom. Toxin over carnage.
The color is just a way to dumb it down in the movies. Carnage is strong because he was with a serial killer who was a good match.