well, i sucked it up this morning and painted! it only took me a couple of hours, and i'm quite happy with my result. i feel like it's a bit homier now, but still light and airy. the darker color also makes my trim pop, and just as i suspected, all of my white accent pieces are really shining.
the color i used is behr's "dolphin fin" (i think the name is funny). here is a little preview shot, though it's pretty bright in here right now, so it's kind of hard to see! i will take more photos later.