Some organizations use color coding such as "Green" (for healthy), "Yellow" (for caution), and "Red" (for critical).

有些组织使用彩色编码，比如“Green”(表示健康的)，“Yellow”(表示小心)，以及“Red”(表示危险的)。

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Huge swatches of neon yellows, reds and lime-green swiped across every surface try to provide the color-coding necessary to find one's way around within the vast black box.

WSJ: The Library's Future Is Not an Open Book | By Julie V. Iovine | Public Library Renovation