When used together with warm colors like yellow or red, blue can create high-impact, vibrant designs; for example, blue-yellow-red is a perfect color scheme for a superhero.

当与黄色或红色之类的暖色同时使用时，蓝色会创造出强冲击力、醒目的设计；例如，蓝黄红就是超级英雄完美的配色方案。

youdao

If you mix blue and yellow, you get green.

蓝色和黄色相混合就是绿色。

《牛津词典》

They began as an army of red, blue, yellow, green, white, and purple.

这支军队最初的颜色有红、蓝、黄、绿、白和紫。

youdao

One is that there's four different colors and so you can see red, blue, yellow, green here - four different colors and that's all there are, there aren't more than four.

一是这些梯阶有四种不同颜色,你可以看到红 蓝 黄 绿,恰恰只有四种不同颜色,不多不少

耶鲁公开课 - 生物医学工程探索课程节选

Blue-yellow colorblindness is rarer and develops later in life, often brought on by aging, illness, medication or head injuries.

WSJ: New Outlook for Colorblindness

Using a specialized sub-pixel signal processing for Sharp's red-green-blue-yellow Quattron pixel panel, the next genesis of Quattron will allow the control and use of these colors individually, enabling the reproduction of double resolution in one singular pixel.

ENGADGET: Sharp AQUOS Ultra HD, 1080p HDTVs eyes-on HD

It had to be put together from half a dozen towns, a church from here, a school from there, supplemented with mock-ups, masking mattes, blue- and yellow-screen and back-projection.

ECONOMIST: Robert Boyle