What does it mean and how do your eyes change colors randomly?

Blue to Dark Dark Brown

As recently referenced, presentation to light makes your body produce more melanin. Regardless of whether your eye tone has set, your eye tone could somewhat change on the off chance that you open your eyes to more daylight. Therefore, your eyes may seem a hazier shade of earthy colored, blue, green, or dim, contingent upon your present eye tone.

Hope this helped :)