Saw UAP fly over house

I was watching some objects in the sky, that I believed to be drones but the did not have the usual red and green lights, they looked like flames. I thought they might be remnants of fireworks but they seemed to be flying controlled. Two flew side by side. I didn't even think of them as UAPs. While looking at these, my Granddaughter said "look at that!", I saw it as soon as she said it. Above us, was a circular vehicle, no lights, no exhaust, no control surfaces, no markings, no panel lines. I couldn't hear it maybe due to fireworks. It was just flying in the bottom of the clouds, it's color matched the cloud's color (grey) almost a perfect match. There was maybe a greenish haze around the vehicle. I didn't think to take a pic or video, because I know my phone's camera wouldn't be hi res. And partly due to my disbelief and awe of what I was seeing. It flew from south to north and disappeared behind trees at the horizon. It flew in a straight line just like an airplane would.