Phidippus clarus, the brilliant jumping spider. This is a female, which is beautiful in my opinion, but the males are mostly black and have iridescent blue chelicerae (mouth parts that look like fangs). Behind this spider you can see a line of web, a sort of safety harness that had been attached before jumping to this spot.
I felt very fortunate to spot this spider as I’ve never seen any of this species before, to my knowledge. I didn’t even know they lived here until last summer, when I found this one. I hope to see a male one day and maybe even get a good picture.
this is its range, apparently: https://en.wikipedia.org/wiki/Phidippus_clarus#Habitat_and_distribution
I’m in the continental US (I don’t want to be more specific than that, although over time I’ll probably reveal myself by the array of critters I post)