1.
orange (fruit)
A round citrus fruit with orange skin. From English 'orange.'
2.
orange (color)
The color orange, between red and yellow.
オレンジ refers to both the fruit and the color orange, from English 'orange.'
As a fruit
As a color
The color is normally オレンジ色, with 色 attached. Bare オレンジ before a noun sounds like the fruit, so use オレンジ色の to modify.
Similar words
- オレンジ: Western orange (larger, for juice)
- みかん: Japanese mandarin orange (more common in daily life)