>>512637298
Your parents must've had two hidden genes for blue eyes.
Your parents must've looked a bit like – Bb / Bb – and you must've inherited both bs, like – bb –.

I just said that to be certain you can have blue eyed kids, you have to have at least one parent with – bb –, because although it is a certainty with one parent, it is not a certainty with two brown eyed parents. You could end up a – BB –.