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.
She may be born with blue eyes (the eyes sometimes don't produce much -- if any -- melanin while the baby is in the womb), but after birth, light stimulates the production of melanin, which is why the eye color may darken or change over time.