The flowers looked like those forest orchids, but they were yellow, unlike those purple or brown-red forest orchids.

这些花看起来像森林兰花，但是是黄色的，不像森林兰花是紫色或棕红色的。

youdao

Greenough wears a blue chequered shirt, red scarf and brown chaps.

格里诺穿着一件蓝格子衬衣、红围巾，棕色皮套裤。

《柯林斯英汉双解大词典》

Some dresses are red. Others are brown.

有些裙子是红色的，其它的都是褐色的。

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The red-haired woman became the little red-haired girl Charlie Brown likes so much.

VOA: special.2009.10.25

The problem is not simply that a strong and cohesive parliamentary bloc will emerge from the present, frantic coalition-building -- a "red-brown" faction strenuously opposed to systemic reform along democratic and free market lines.

CENTERFORSECURITYPOLICY: Center For Security Policy

Around the fourth day of the illness, a rash - flat red or brown blotches - may appear, usually starting on the forehead and spreading downwards.

BBC: Q&A: Measles and MMR

Since red and green make brown, people with red-green blindness often have trouble telling the three colors apart.

WSJ: New Outlook for Colorblindness