Why do hazel color eyes seem to change, when someone is near the seawater?

 Hazel eyes appear to change color due to their unique blend of pigments and the way these pigments interact with light. Hazel eyes often have a combination of green, brown, and even amber tones, and when exposed to different environments—like near seawater—the surrounding colors and lighting can influence their appearance.

Near the ocean, the natural blue and green hues of the water and sky can create a reflective effect that enhances the green or blue tones in hazel eyes, making them appear to change color. Additionally, the salt and minerals in seawater can sometimes enhance the contrast between the whites of the eyes and the iris, which might make the colors seem more vibrant. The bright, reflective sunlight at the beach also plays a role, causing the light to refract differently in the eyes, which can intensify certain shades, making the eyes appear to "shift" in color.

This effect can vary from person to person, as the color variation in hazel eyes is unique to each individual, with some eyes shifting more noticeably than others depending on the lighting and surroundings.