Is it okay to wear my dress blues to prom?

You would adapt it as you would for wear at a ball. Although in your case, your uniform probably looks like that already. If you have a unit, remove unit insignias from the shoulders, swap the tie for a bow tie, and remove the headgear.

Looks like the Tribe has voted to have at it. Just remember that because you'll look different, the range of responses are on a bell curve. Most won't care. Some will think it's great. One or two may get into your face. I recall wearing my uniform to HS reunions. Year 5 an O-1; year 10 an O-3; year 15 an O-4. There was this other guy who wore his uniform and was the same rank as I every time.... until; year 20 an O-5 and year 25 an O-6. Interesting thing was the other guy went terminal at O-4 so he stopped wanting to talk to me. Like I say, the uniform will cause opinions to be formed and results will vary.

If you are on leave and back home and it's your high school's prom, I say sure, because that's what the local kids do here to show their schoolmates that they are proud soldiers. It also reminds school staff, etc. that they should be proud of their graduates serving. Just make sure that you are regulation. If it's an evening event, Bow tie and proper rank and ribbons - no hat in evening. Try white gloves for the grand march!