By adding black and some white one gets the endless varieties of grays - red gray, yellow-gray, blue-gray, green-gray, orange-gray, violet-gray.

加入黑色和些许白色，你就能得到变化无穷的灰色——灰红、灰黄、灰蓝、灰绿、灰橙、灰紫。

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Mold is usually green, white, black or gray.

霉菌通常为绿色、白色、黑色或灰色。

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This here's a new bit, and he touched a shoot which looked brownish green instead of hard, dry gray.

这是新的一点，他摸了摸一根嫩芽，它看上去是带褐色的绿色，而不是干硬的灰色。

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Mongolian spots (technically named congenital dermal melanocytosis) are flat bluish-green, gray or light brown areas where cells called melanocytes have been trapped in a layer of the skin called the dermis.

CNN: What are Mongolian spots?

The gray-green knitted blob next to the sofa seemed larger than it had that morning.

NEWYORKER: Brooklyn Circle

Powder from the drill was a gray-green color, meaning it was not highly oxidized, said David Blake, principal investigator for Curiosity's Chemistry and Mineralogy investigation at NASA's Ames Research Center.

CNN: NASA: Yes, Mars could have hosted life