Olive Oil Color: Is Green a Sign of Better Quality?

1The myth of the green color

On social media, in advertising, and in general olive oil marketing, a bright emerald green color is often presented as the ultimate symbol of quality. While that green is indeed beautiful, it is not a quality indicator at all. In fact, in some cases, it can mean the exact opposite.

2Where does olive oil's color come from?

The color of extra virgin olive oil depends on two main groups of pigments: * Chlorophylls: These give the green hue. They are highly abundant in green, unripe olives and naturally degrade as the fruit ripens. It is also important to know that chlorophylls are photo-sensitizers: exposed to light, they actively accelerate the oxidation of the oil. * Carotenoids (lutein, beta-carotene): These give the golden-yellow tones. Carotenoids are much more stable than chlorophylls.

3Why color varies

A deep green oil can result from: * Olives harvested very early in the season (bright green) -> A good sign for a high polyphenol count. * Certain cultivars that naturally yield a greener oil (e.g., Coratina or Moraiolo) -> Neutral. * The fraudulent addition of olive leaves during milling -> A deceptive practice used to artificially boost the green color.

A golden-yellow oil can result from: * Perfectly ripe olives -> Normal, and not necessarily lower in quality. * Filtered oil after a few months of storage -> Neutral. * Cultivars that naturally yield a golden hue (e.g., Ligurian Taggiasca) -> Neutral.

4Official tastings hide the color

Did you know that official Panel Tests (conducted by the International Olive Council) require the use of dark blue glasses? This is specifically designed to hide the color of the oil from the taster. Color is known to influence our judgment subconsciously, yet it has nothing to do with the actual taste or health benefits.

True quality is measured only by smell and taste. Never by the eyes.

A green oil can be excellent or mediocre. A golden oil can be excellent or mediocre. Color does not decide.