I got it wrong. It wasn't the red one but the blue one.

我弄错了。不是红的那个，是蓝的那个。

《牛津词典》

The orange stripes go through the green spiral but not the blue one.

橙色的条纹穿过了绿色的条纹，但没有穿过蓝色的。

youdao

Wash the white clothes together, and the blue one separately.

那些白衣服放在一起洗， 这件蓝的要单洗。

《新英汉大辞典》

One man is in a police uniform, the other in a blue suit.

VOA: special.2010.04.16

Remember that this molecule, let's look at the blue one wouldn't be the same if I turned it upside down.

让我们记住,如果我把蓝色的,单链倒过来,那么这条链和原来不一样了

耶鲁公开课 - 生物医学工程探索课程节选

The corresponding half of the ladder that corresponds to any given ladder, let's say the black DNA molecule that corresponds to the blue one is not just a mirror image.

与任何单链配对的,另一条单链,比方说与蓝色DNA分子,配对的黑色DNA分子,并不是蓝色DNA分子的镜像

耶鲁公开课 - 生物医学工程探索课程节选

The blue one (Benny's) and the green one (Jim's) were also in the desk drawer.

NPR: Excerpt: 'Then We Came to the End'

'Not the blue one again, get a new T-shirt, what's the matter with you?

NPR: Stylist Brad Goreski Shares Tricks Of His Trade

Jeremy Bush and four other people, including a 2-year-old child, escaped from the blue, one-story 1970s-era home in Seffner, a Tampa suburb.

CNN: A loud crash, then nothing: Sinkhole swallows Florida man