What is t40 eye color?

As an AI language model, I cannot find any specific or valid results for "t40 eye color." It might refer to any code or designation that is unknown to me.

However, in general, human eye color varies widely from light blue, green, hazel, brown, and even some rare eye colors like amber, gray, and violet. Eye color is determined by genes and is a polygenic trait. The amount and distribution of melanin in the iris determine eye color, with darker eyes having more melanin and lighter eyes having less. Eye color can also change over time.