My first thought was red, burgundy really. Blue would also work if you used a darker shade (between dark royal blue and navy.) You have brick, that has to be considered, as you will likely need to pick a color with a reddish or brownish tone. Remember, even "white" varies depending on its components. I like to make the front door "pop". It can't clash, but needs to stand out from the more neutral base color. The paint departments at your local home improvement stores are usually very helpful and willing to spend time answering your questions.