Thank you! I know it was a Behr paint, and I want to say it was Vermilion Red. But looking online (and I know online vs. IRL swatches can be deceiving) it definitely doesn't look that color. So good luck!
I used a handheld post hole digger to create holes about 11 inches deep, then filled them in with dirt. I then spread gravel around the ground around the posts. I've seen others who cemented them, but that can cause water to pool and then rot the posts. YMMV