If you are looking for door colors and confuse about what color door goes with a grey house than I have a perfect solution for you. Few months ago I was also stuck in the same situation and finally find the answer of my question by analyzing some real samples of different front door paint colors with grey house. Gray is most favorite color by most of the people and they want to use it on their houses but the entrance is also much important because everyone enter into the house from door so it should be prominent and match perfectly with house gray theme. See some pictures of gray houses with different color of doors.
Also see Front door colors with White House
Grey House with Red Door
Grey house look elegant with yellow, blue, red and white doors. I am not going to force you to use any color that look perfect to me. I just show you some samples and after see these images; you should decide which one is best for you. You may share these images with your friends to get some honest suggestions on it.
Online market is full of different door colors; you don’t need to look for custom paint colors. Just select any color and buy it from your local or online market. There are many patterns are also available with door colors that match with grey houses.