I am a huge believer that your nail color as wells your clothing colors must go with the season. This time of year is always hard to figure out what colors to put on your nails since its kinda spring-ish but not really. I found a bunch of cool nail colors that are FF approved and obviously hot celebrities rocking a trend is an indicator that the colors are somewhat appropriate : P
Here are some colors for the inbetween season:
If all else fails, keep it simple, as long as your nails are filed and clean this is always a good look anytime of year!