Well, I am the mom of a biracial son who has blue eyes and could "pass" as far as white folks are concerned. Now, another multiracial or black person could pick him out in heartbeat.
Those children(MJ's) have an olive skin tone, and if you were to have close-ups, you would be able to see other features that would show you they are not all white. No way to say whether MJ is the bio dad, but their dad is either black or biracial.
I have read that MJ's father's family was listed on the 1910 census as mulatto, which is an old name for someone with a black/white mix. Heck, his dad has blue eyes and is light complected and his mom is not very dark either. Obviously, the kids would have gotten all light genes from Rowe and they could have gotten dark or light genes or both from MJ. As far as their hair being straight, who knows if the straight hair is natural? I know that MJ dyed the oldest son's hair when he was a little guy.
Here's a pic, so you can see that even a man darker than MJ can produce a very light child, even one with blue eyes.
6 months with mom and dad(yes we have a DNA test that PROVES he is both of ours, LOL)
Age 13
Here is my son's dad with both his kids. Little girl has red hair and blue eyes. We call my ex the recessive man, LOL
Marsha