2020-05-24 - Boulder, CO - Light

White dot moving/stopping with a purple tinge for 30 minutes high in sky

My girlfriend and I were stargazing at about 2:30 am on a field with good skies. Fast moving clouds temporarily blocked view after about 20 minutes but otherwise good conditions. We noticed a light somewhat brighter than any star in sky was moving erratically directly above us. Returning to almost exactly overhead and stopping many times, moving in all directions and changing, but did not seem like a helicopter. Difficult to gauge height from ground or size. Seemingly subsonic speeds, but otherwise difficult to gauge speed without distance. Did not make any noticeable sound. There was a faint deep purple tint to the highest and wispiest clouds around it. Did not know if it was between the highest clouds and us or behind them, but was above the lowest and fastest moving clouds when they came in. We took several videos on our phones, but it was hard to make out a reference point or star in the videos so the camera footage is questionable unfortunately. It was ! larger than any star in the sky, and the light did not look exactly like a point source. It was almost like a light strip but far away. It pulsated occasionally with slightly brighter white and was purple on and off around wispy clouds (sometimes it did not give off the purple glow). Went inside eventually because we got cold.