Yes. It is OK. These two tall, massive elements are often well-placed together, to leave remaining space most usable and open-feeling.  Actually, Both your refrigerator and your oven create and dispel heat.  (Today's typical refrigerators vent heat out the front. Older models produced heat at the back, which was more difficult to disperse.)

Be sure to arrange for some countertop space nearby for both oven and refrigerator in-and-out activity.