Here's why:
* Variety: Different Transformers, both Autobots and Decepticons, have a wide array of eye colors, including blue, red, yellow, green, and more.
* Character Design: Eye color is often used as a stylistic choice for individual characters. It helps to differentiate them visually and reflects their personalities or origins.
* Media Depiction: The color of a character's eyes may vary depending on the specific media they are featured in, such as the cartoon series, comics, or live-action films.
For example:
* Optimus Prime: The Autobot leader has blue eyes in many depictions, but in the 2007 movie, he has yellow eyes.
* Megatron: The Decepticon leader typically has red eyes, but in the animated series "Transformers: Prime," he has purple eyes.
So, while the blue eyes/red eyes idea may be a popular generalization, it's not an official rule. The color of a Transformer's eyes is just one aspect of their individual design, and it's not a reliable indicator of their faction affiliation.