Every bag of coffee beans carries a roast level, whether it is printed on the label or simply assumed from the colour of the beans. That small detail shapes the way your coffee tastes more than almost anything else. For a specialty coffee roaster, choosing a roast level is a decision made with care and intention.
At Lygon Coffee, we roast premium Arabica coffee beans in small batches in Adelaide, sourcing beans from renowned coffee-growing regions around the world. Every roast is developed to highlight the unique character of each origin while maintaining consistency and quality. Understanding coffee roast levels helps you choose beans that suit your taste, and this guide covers the basics simply.
What Are Coffee Roast Levels?
Coffee roast levels describe how far coffee beans have been taken through the roasting process. The most obvious way to describe them is by the colour of the roasted beans, which range from extra light to dark, or even extra dark. As coffee beans develop in the roasting process, they become darker.
Coffee roast levels determine flavour, acidity, body and aroma. In broad terms, coffee roasts fall into one of three colour categories: light, medium and dark. Lighter roasts generally preserve more of the unique qualities of a coffee, while darker roasts carry more of the character of the roast itself.
Because roast levels determine so much of the final cup, roasters choose an approach based on the beans in front of them. Small-batch roasting allows that choice to be made for each origin, which is one reason specialty coffee roasters pay close attention to how far each batch is developed.
The Roasting Process: How Beans Develop
A green coffee bean has none of the characteristics of a roasted bean. It is hard as a rock and smells grassy. The green stage of a bean's life is still useful, because green coffee beans can be stored for long periods of time without losing quality or taste. Roasting coffee beans unlocks the aroma and flavour that are sealed away inside.
During roasting, the beans pass through several visible stages. Using sight alone, a roaster can track the degree of roast from green unroasted coffee through a pale stage, an early yellow stage, a yellow-tan stage and eventually a light brown stage. Drying the beans takes place around 320 degrees Fahrenheit, or 160 degrees Celsius.
A key moment occurs at the first crack. Light roasts last until a single crack is heard in the beans, called the first crack, which happens between 196 and 205 degrees Celsius. After being developed through first crack, the coffee reaches further roast levels, including medium, medium-dark and dark.
The Five Common Coffee Roast Levels
While many roasters use their own names for roast profiles, five commonly referenced coffee roast levels appear again and again: light, light-medium, medium, medium-dark and dark. The table below summarises how they compare.
| Roast Level | Characteristics |
|---|---|
| Light | Roasted for a shorter period at a lower temperature; brighter flavours; more origin character |
| Light-Medium | Slightly more development than a light roast; a bridge between bright and balanced |
| Medium | Lower acidity; balanced flavour; smoother, mildly intensified body; no oil on the surface |
| Medium-Dark | More developed than medium; deeper colour and more roast influence |
| Dark | Developed furthest; darkest beans; roast character becomes more evident |
Roast names can vary from roaster to roaster, which is why colour and development matter more than the label on the bag. A roast that one roaster calls a city roast may be lighter than another roaster's version. The most reliable way to compare roast levels is to look at the beans themselves and, of course, to taste the coffee.
Light Roast Coffee
Light roast coffee refers to beans that have been roasted for a shorter period of time and dropped out of the roaster at a lower temperature. Because they spend less time in the roaster, light roasts retain more moisture in the bean. They have brighter flavours overall and retain more of the specific flavour characteristics of the region where the coffee was grown and the processing method used.
Light roasts generally finish around the first crack, which occurs between 196 and 205 degrees Celsius. Within the broader light category, roasters may use names such as cinnamon roast and city roast. A cinnamon roast is around 385 degrees Fahrenheit, or 196 degrees Celsius, while a city roast is around 400 degrees Fahrenheit, or 205 degrees Celsius.
For coffee drinkers who want to taste the origin of the bean, a light roast is hard to beat. The brighter flavour profile lets the character of the region and the processing method come through clearly, which is why light roasts are popular among specialty coffee enthusiasts.
Medium Roast Coffee
Medium roast coffee is developed beyond the first crack, giving it a different character to a light roast. A medium roast has lower acidity and a balanced flavour, with a smoother, mildly intensified body. A medium roasted bean will have no oil on the surface, which makes it easy to identify by sight.
Medium roasts sit comfortably between the brightness of a light roast and the deeper development of a dark roast. The balanced flavour and smooth body are the qualities most often associated with this level, and the beans themselves look clean and dry with no surface oil.
This balance makes medium roast a dependable starting point. It keeps some of the origin character of the bean while allowing the roast to round out the flavour, and the lower acidity appeals to drinkers who find very light coffees too sharp or very dark coffees too heavy.
Dark Roast Coffee
Dark roast coffee beans are roasted for longer and taken to higher temperatures than light roasts, so they develop well beyond the first crack. The beans become darker as they develop, moving from light brown toward the darker end of the colour range.
A range of named roasts falls into the later stages of development. After beans are developed through first crack, they can progress to roast levels with names including Full City+, Vienna, French, Italian and Columbian. These names describe specific points along the later stages of the roast, and they have been used by roasters for generations.
Where a light bean looks dry and pale brown, a dark bean is deeply coloured and sits at the opposite end of the range. Dark roasts are the clearest example of how the roast itself shapes the final cup, because the longer development becomes part of the coffee's character.
How Roast Level Affects Flavour, Acidity and Body
Coffee roast levels determine flavour, acidity, body and aroma. Choosing a roast level is really a choice about which qualities you want your coffee to show.
- Light roasts: brighter flavours overall, with more moisture retained in the bean and more of the origin's specific characteristics.
- Medium roasts: lower acidity, a balanced flavour and a smoother, mildly intensified body.
- Dark roasts: developed beyond the first crack with noticeably darker beans and a more evident roast character.
There is no single correct roast level. Some coffee drinkers prefer the bright, complex flavours of a light roast, while others enjoy the character that develops in beans roasted further. The best way to find your preference is to try the same coffee at different roast levels and taste the difference for yourself.
Choosing a Coffee Roast Level
Your ideal roast level depends on the flavours you enjoy. If you like bright, aromatic coffee that still carries the character of its origin, a light roast is the natural starting point. If you prefer a balanced cup with lower acidity and a smoother body, a medium roast is a dependable choice. If you enjoy coffee that has been developed well beyond the first crack, a dark roast is worth exploring.
At Lygon Coffee, our OmniSoul blend is roasted as an omni-roast, designed to suit a range of brewing methods. We roast in small batches in South Australia to maximise freshness, consistency and flavour, and we offer single origin coffees alongside the signature blend. Understanding roast levels helps you find the coffee you will enjoy most, whether you brew at home or plan a larger event.
Frequently Asked Questions
What are the different coffee roast levels?
Coffee roasts fall into one of three colour categories: light, medium and dark. More specifically, five commonly referenced coffee roast levels exist: light, light-medium, medium, medium-dark and dark. The level depends on how long the beans are roasted and the temperature at which they are dropped out of the roaster.
Which coffee roast level is best?
There is no single best coffee roast level. Lighter roasts preserve more of the unique qualities of a coffee, including brighter flavours and characteristics from the growing region and processing method. Medium roasts offer lower acidity and a balanced, smoother body. The best choice depends on your personal taste, so it is worth sampling a few different levels.
How is a coffee's roast level determined?
Roasters track the degree of roast using sight, sound and temperature. Light roasts last until the first crack is heard in the beans, which happens between 196 and 205 degrees Celsius. Medium and darker roasts are developed further beyond that point. The colour of the beans, from light brown to very dark, is the most obvious indicator of the final roast level.