Steve hits the nail on the head. If comments were made suggesting the hope that a baby was not too dark skinned then yes it would be racist. And that of course is far from impossible. Though as yet it is a very vague someone said something from a one sided staged interview. On the other hand if the comments were of the type "I wonder if the baby will look more like Meghan or Harry" then it is the kind of comment every family makes before the arrival of a baby.