Sentence examples similar to that is perfectly alright from inspiring English sources

But should sir or madam wish to wear jeans with his or her tuxedo jacket, that was perfectly alright, too.

Having a pale skin is a key, but if you have a darker skin, that's perfectly alright.

That's perfectly alright.

The iPhone fired everyone's imagination when it came out and continues to inspire designs even today, but that's perfectly alright; they're inspired, not ripped off.

I have no control over what happens next -- hurt feelings, disappointment, anger, or understanding, acceptance and love -- and that's perfectly alright because I only need to have control over myself.

That is perfectly fine.

That's perfectly OK.