The bard, as part of the rogue group, was one of the standard character classes available in the second edition Player's Handbook; in this edition, the bard was regularized.
Also, not all babies are born with blue eyes. Babies of African, Asian, and Hispanic descent are more likely to be born with brown eyes. This is because darker-skinned individuals tend to have more melanin in their eyes than Caucasians. Even so, a baby's eye color may deepen over time.
Therefore, if someone has one gene for blue eyes and one gene for brown eyes (we usually have two genes for most things like eye color, hair color, or height, getting one from each parent), the baby will have brown eyes. But even if two parents have brown eyes, they could both have one gene for blue eyes.