Espresso roast doesn’t always mean the roast is dark, rather it is actually a roast type, which roasts the coffee in a way that it is better suited for espresso brewing. This means espresso roasts might be anywhere between light and dark. While roasting espresso’s it is important to aim for a rounder and less acidic end result than in a similar filter roast. this is to soften the high acidity and bitterness of the espresso brew.