For me, espresso is the color of furniture. It is a very dark brown, almost black. It is quite stylish in some lines of furniture. I like the espresso finish on long slender and tapered legs, with white knobs of the drawers and doors.
But to my sister, espresso means a coffee drink. That woman is addicted to Starbucks and drinks espress on several times each day. Personally, I do not think that much coffee is good for anyone. But I also wonder how she can afford it several times a day, at $5 per cup?