This article is correct, as is my post.
The remaining possibility, discussed in the many posts you did not read, is that one or both parents do not have true blue eyes, but rather hazel eyes that look blue.
I read the hazel-eye comments but they were irrelevant. I told the story of my sister and her husband and their kids and their grandfather, using them as a concrete example. But like an nosy old woman looking for conflict and interested in abusing others, you imputed motives all through my post that were not there and never were issues.
I did not say my brother in law had any lack of understanding of the science of Mendel or any other science. YOU, however, very rudely and out of the blue, with NO basis for your accusations, accused my brother in law of not understanding science. You had NO basis for this. I'm correcting you because you are accusing people YOU DO NOT KNOW of not knowing the most basic elements of science. You are wrong. You probably don't want to take this any further because you are going to continue being wrong and being corrected no matter how many times you try to cover up your old-womanish busybodying that has NOTHING to do with anyone you know. Don't insult my relatives, particularly with baseless charges. Go insult your own relatives. Mine aren't ignorant.