JT - that pic is soft maple, but red soft maple is pretty similar to hard maple. Red Maple is the species name, while it can have a little more color, the stuff that is all sap will look more like the hard maple we are all accustomed too. That particular sample seems to have a little heart
Maple trees are unique in that they are mostly sapwood. If you have ever seen a felled maple log you will notice it is 2/3 or more sap, with a small cicle of brown heart. Of course this varies by growing conditions.
I know I am in the minority, but I love maple with color. It might have less commercial value, but maple that has not been sorted for color can have streaks of brown, red tones and even blue tones. Look at some of Krenov's work or the dresser in the reader's gallery of the newest issue of FWW
Here is a sample of some hard maple I quartersawed. the brown streaks are heartwood.
Great looking bench and you should be proud. I read about so many people going for so long with out this proper work holding, part making tool. You've made the bench your first effort and it will improve all your efforts to come. Congrats.