So you're fine with blonde hair, blue eyes disappearing? This can potentially happen when mass racial mixing takes place.
Look at India/Iran. Aryans once occupied those countries after travelling from eastern Europe and settling there, but were eventually bred out of existence by mixing with the brown natives.
Redheads are less than 2% and I still see redheads. India & Iran are pretty close to the cradle of civilization where the sun shines bright so having melanin is probably better anyway. I can't even tan; just straight burn. What good does my blue eyes & white skin do me if I have to use 100spf just to take a walk there?
Worry about yourself now, not other selves later when we are both worm food.