It is the safe option without much fuss. But my proposal for the next shopping is to get some courage and decide to step out of the boundaries of the everyday. Therefore, choose a dark brown suit or blazer.
Especially if you get invited to a high school reunion or a wedding and you want to stand out.
A dark brown suit will surely have that kind of an effect.
You will not make a mistake. And proof of this are the following combinations (there are dark and bright, both formal and casual) that will surely convince you.