The unofficial color combination when you can't think straight for me is black and white color combination. It is safe as it is universally accepted. Asides that, the outfit you style just has a way of coming together with minimal effort on your part. I know because that is my style uniform when every other thing fails.
This photo was taken last week Wednesday when I had nothing to wear aside trusting my go to color spectrum to pull an outfit together for me. I also wore flats as I sustained a knee injury at the gym earlier that week (one of the reason you need flats in your life, that is if you are a klutz like me).