I cooked some bulls eye eggs with some onion, and after cooking there was some green stain on the albumen, but not before cooking, therefore I wonder what it might be. I thought it could have come from the onion but just a hypothesis.
I'm assuming clean pan, no green die/residue, transfering to the egg whites. In which case green spots would consider mold/bacterial contamination based on this, in which case "DO NOT EAT".
However if the whites are cloudy or overall green tint would be safe caused by vitamin B2. If you are getting fresh high quality eggs, this would be more likely.
Sorry I couldn't locate any good images to help out here, Green Eggs and Ham is really messing up the image search.