Oranges get their bright orange color from natural plant pigments called carotenoids, mainly beta-carotene, the same pigment that gives carrots their color.

Green to orange transformation
Oranges start out green because they contain chlorophyll (the green pigment found in leaves). As the fruit ripens, chlorophyll breaks down and carotenoids become visible, turning the peel orange.

Cooler nights help chlorophyll fade faster, which is why oranges grown in cooler climates often turn bright orange. In tropical regions, ripe oranges can stay green on the outside but still be perfectly sweet inside!

Color does not always indicate ripeness
The orange color doesn’t always mean the fruit is sweeter or riper. Sweetness depends more on sugar and acid levels, not peel color.

The color “orange” was named after the fruit not the other way around!

Oranges look orange because chlorophyll fades as they ripen, revealing carotenoids that give the fruit its iconic color.