A banana is yellow outside and white inside.

香蕉是外黄内白的。

youdao

The object was shaped like a yellow fruit: the banana.

VOA: special.2009.11.29

Amazon's online superstore has become the unlikely stage for 21st-century amateur comedy, where thousands of customers have submitted reviews for products ranging from the self-explanatory explanatory book "How to Avoid Huge Ships" to the Hutzler 571 banana slicer, a yellow plastic banana-shaped device that cuts bananas into even slices.

WSJ: These Amazon Products Are No Joke, But the Online Reviews Are

"I was as yellow as a banana, " she recalls.

FORBES: Magazine Article

Half-asleep, I shuffled to the canopy-level observation deck of my rustic wooden cabin, grabbing binoculars and Tito Narosky's "Birds of Argentina and Uruguay" just as a flurry of yellow plumage transformed into what locals term the "banana toucan, " a rare and striking saffron toucanet.

WSJ: Bird Watching in Misiones Province, Argentina