Yes, llamas can have blue eyes.
While not the most common eye color, blue eyes do occur in llamas. The reference provided indicates that a dark blue eye, which may sometimes appear dark grey, is generally considered acceptable for breeding purposes. However, it's crucial to distinguish this from genetic cataracts, which would disqualify a llama from breeding.
Therefore, if a llama has blue eyes, a veterinarian should examine it to ensure the eye color isn't related to an underlying health issue, such as cataracts, before breeding.