What color eyes do werewolves have?
A standard, run-of-the-mill werewolf will have golden-yellow eyes. This is, essentially, the default setting. If a werewolf becomes an Alpha, he or she will then have red eyes. It makes no difference if you're a True Alpha or not, as the color is the same.
Werewolves are traditionally yellow or red eyed. I think to think of Yellow eyes to be the baseline normal with Red eyes being more demonic in nature.
Werecoyote. Werecoyotes possess the same colored eyes as their Werewolf cousins, with Betas possessing gold or blue eyes depending on if they have taken innocent human lives.
There are three general mystical eye colors for a werewolf or a coyote: bright gold, steel blue and red. Their rank and power are also reflected by how brightly their eye color shine.
Peter explains that if a werewolf has blue eyes, it's because they have taken an innocent life. When Jackson becomes a werewolf in season 2, his eyes are also blue.
blue eyes descend from a single genetic mutation means that every single person on the planet with blue eyes descended from one common ancestor. In fact, a team of geneticists at the University of Copenhagen actually traced that mutation all the way back to a single Danish family.
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Just like coat color, gray wolves can have a variety of eye colors. Most wolves will have yellow, orange, hazel, light brown, or green eyes.
Wolves can only have appearing blue eyes when they have a genetic defect (such as cataracts, which is really rare). In a natural way, wolf eyes never come in blue. The Iberian wolf you mentioned most likely had two different coloured eyes due to genetic defects.
An Alpha's eyes glow red. Yellow is the most common eye color among Betas and Omegas. Some Betas and Omegas have blue eyes. This color difference is an indication that they have taken an innocent life. Jeff Davis says the root cause of this change comes from within the werewolf (or werecoyote).
Can werewolves have red eyes?
Moving on to other regions and time periods, there are actually lots of instances of werewolves having all kinds of eyes. This includes red eyes, especially in the Early Modern period from writers like Henri Boguet and a few others. And, of course, plenty of werewolves have yellow eyes.
Green is considered by some to be the actual rarest eye color in the world, though others would say it's been dethroned by red, violet, and grey eyes.