Lighting is a bitch.
Normally my nails have enough contrast to get the point across in the sub-optimal lighting I have access to, but the silver on the shiny lilac color is subtle enough that I spent about four times longer than usual trying to get the lighting right (no shadow, minimal reflection, still enough light for a good picture). I finally decided what I had was as good as I was going to get, and then tweaked the levels a bit in post so you can see the colors better.
I’d do more photography if 1) I had a camera with a manual focus (will be fixed soon), and 2) the lighting and potential backdrops in my apartment didn’t suck so badly.