Well, it is not normal for your eyes to change color. And also, it is kind of difficult to identify it. But on the other hand, from your description, I have to say that your eyes may suffer from arcus, which is caused by high cholesterol showing in your eyes. And according to some researches, this kind of eye diseases could occur just as easily as in older folks. For your situation, I will suggest you go to your primary care doctor, and then get a blood test, for high cholesterol is more dangerous for your heart than it is for your eyes. Anyway, just be careful about it.
For your question, maybe some people think it is serious for your eyes, even your body. Actually, you have no necessity to worry your condition. Generally speaking, new born babies own the pretty eyes, but they will become darker color into blue with time going. Experts says that melanin which exsist on our body takes slowly during our age. Therefore, we will get grey and white hair when we become older than before. Certainly, you may go to see your doctor to take an exam for your eyes, they will give you more detailed information about your condition. It is a normal condition for us. Best wishes!
As we all know, our eye color is an genetic trait determined by the pigmentation in our iris, which is recognized as the colored part of our eyes. Further, pigments in the iris spread apart or compress if the pupil size changes so that eye color can be changed a bit. Besides, the scattering lights can also make some vision confusion. It is worth mentioning that some certain emotions can also change both the the iris color and the pupil size, especially when we are angry, loving or sad. And recent studies have found that with time goes by, the eye color will become lighter. For example, the very brown eyes will be hazel with age, a color of brown and green combination.