Generally light colors looks good for an entryway.Some of the colors are
1.Plain white which looks clean.
2.Plain grey looks decent.
3.Pale lime green is a modern paint.
4.Regal blue is awesome entryway paint.
It depends upon the size of the entryway and the amount of light available. If it is small and closed-in, use a light color, but avoid plain white. If it is large and open, you can use a darker, more vibrant shade.