Last night, I had my very first flight on one of DL's 739ERs (Flight 1646 PHX-ATL). About the mood lighting, while most of the flight the cabin was lit in the deep blue lighting by the ceiling, during the final cabin check before landing, the whole cabin (including the sidewall lighting) was lit up in pink (yes, PINK!).

I was wondering, is this the normal lighting procedure used on DL 739ER flights? I wonder if any other colors are ever used.