Pour a stout next to a pale lager and the difference is obvious before you even taste either one — one looks like iced tea, the other looks close to coffee. If you’ve ever stood in front of our cooler wondering how does stout get its color, the short answer is malt, not additives or some brewing trick. It all comes down to how the grain was roasted before it ever touched water.
We get this question a lot on the floor, usually from someone comparing a Guinness or an imperial stout to a pilsner and wanting to know what’s actually different about it — not just how it tastes, but why it looks the way it does.
It’s worth understanding, because once you know what’s driving that color, you’ll have a much better sense of what to expect in the glass before you even crack it open.
How Does Stout Get Its Color?
Stout gets its color from roasted malt — grain that’s been kilned at high heat for long enough to turn dark brown or nearly black, the same way a slice of bread darkens the longer it sits under a broiler. That roasting process is really the whole answer to how does stout get its color, and it holds up whether you’re looking at a mild milk stout or something as dark as motor oil.
Brewers don’t roast every grain in the batch that hard. Most of a stout’s grain bill is still pale base malt, the same stuff that goes into a lager. What changes the color is a smaller percentage of heavily roasted specialty grain mixed in — enough to turn the whole batch dark without making the beer impossible to drink. The longer and hotter that portion of the grain is roasted, the more it darkens, and the more of that roasted character it hands off to the finished beer.
Why Is Stout So Dark?
Stout is dark because brewers lean harder on those roasted grains than almost any other style out there. Depending on the brewery, that might mean chocolate malt, black patent malt, or roasted barley — Guinness is the famous example of the last one, using unmalted roasted barley instead of a roasted malt, which is part of why it reads drier and more coffee-like than a lot of other stouts.
Historically, stout wasn’t even its own separate style — it started as “stout porter,” meaning a stronger version of porter, another dark beer built the same way with roasted grain. Over time stout became its own category, but the core idea never changed: push the roast further, and the beer gets darker and more intense right along with it. That same logic is really what separates imperial stout vs. regular stout today — an imperial stout just pushes that same roasted grain bill (and the alcohol) further still, which is a comparison worth its own post.
Does the Roast Affect Flavor, Too?
Yes — the same roasting that darkens the grain is what gives stout its coffee, chocolate, and toasted flavor notes. A lighter roast leans toward chocolate and caramel; push it further and you start getting espresso, dark chocolate, and a dry, almost burnt-toast bitterness in the finish. That’s why two stouts that look nearly identical in the glass can taste completely different depending on which roasted grains the brewery used and how far they pushed them.
Additions like oats or lactose (common in oatmeal stouts and milk stouts) change the mouthfeel and sweetness but don’t do much to the color — that’s still almost entirely the roasted grain’s job.
How Does Stout Compare to Porter and Lager in Color?
So when people ask how does stout get its color compared to something like a porter or a lager, it’s really a matter of degree. Porter uses roasted grain too, but usually less of it, which is why a lot of porters land somewhere between deep reddish-brown and black rather than the near-opaque black you’ll see in most stouts — there’s real overlap between the two styles, and it’s not always a clean line. A pale lager, on the other hand, is brewed almost entirely with unroasted base malt, which is exactly why it stays gold instead of ever heading toward brown.
If you’re still sorting out where stout and porter actually fit among everything else on the shelf, our breakdown of what actually counts as a craft beer is a good next read. And if you’re curious which local breweries are behind a lot of the darker beers we carry, we’ve also put together a rundown of Pennsylvania beer brands worth knowing.
Frequently Asked Questions
Does a darker stout mean a higher ABV?
No. Roast level and alcohol content are two separate decisions a brewery makes. A milk stout can be quite dark and still fairly sessionable, while a much paler barleywine can run well stronger. Color tells you about the grain, not the strength.
Is every stout made with the same roasted grain?
No — that’s a big part of why stouts taste so different from each other. Some rely on roasted barley, some on chocolate malt, some on black patent malt, and many use a blend. Oatmeal and milk stouts add oats or lactose for body and sweetness, but the color is still coming from the roasted grain underneath.
Can a stout ever be light-colored?
It’s rare, but some breweries have experimented with “pale” or “white” stouts — using specialty processing to strip color from the roasted grain while keeping much of the roasted flavor. It’s a novelty more than a mainstream style, and understanding how does stout get its color is exactly what makes that trick interesting in the first place: it’s proof the color and the flavor aren’t as inseparable as people assume.
Does the color affect how a stout should be served?
Not directly, but stouts are generally best a little warmer than a pale lager — closer to cellar temperature than ice cold — so the roasted, chocolate, and coffee notes actually come through. A tulip glass or a standard pint glass both work fine; what matters more is not serving it straight out of the coldest part of the fridge.
How far back does stout’s dark color go?
As far back as the style itself. Stout grew directly out of porter in 18th-century England, and dark roasted grain has been the defining ingredient the whole way through — this isn’t a modern brewing trend, it’s the original point of the style.
Come See (and Taste) the Difference at Bound Beverages
The best way to actually understand the difference between a stout, a porter, and everything in between is to try a few side by side. Our shelves rotate through a wide range of dark beers all year, not just around the fall and winter months, and our staff can walk you through what’s roasted with what if you want to compare.
Stop in at 308 Easton Road Warrington, PA and see what we’ve got in stock, or give us a call at (215) 491-6600 if you want to check availability before you make the trip.