If you used new potting soil that had fertilizer already in it, and then also gave the plant some liquid fert, you might have overdone it on the fertilizer, Greg.
My basil takes full-on Florida sun here, so I must admit I've never seen them get sun burn. It's one plant that goes straight through our brutal hot, humid summers without batting an eye. But it could be mine have always been acclimated, as I do raise my own seedlings. Your weaker sun up there in the Pac NW should be gentle enough, as here we are already 2 months past the summer solstice. (where'd the summer go?)
Actions to take, yes, as Cindy said, pinch off the bloom clusters, and any leaves that look bad. Give a little extra water for a few days and see if it bounces back. The newer small leaves look green, so maybe it's already recovering and it was just transplant shock.
