colour code

noun
🔊/ˈkʌlə kəʊd/
🔊/ˈkʌlər kəʊd/
(US English color code)
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  1. a system of marking things with different colours so that you can easily identify them色标(法),色码(法)(用不同颜色表示识别标记)
    • Follow the colour code carefully on all electrical wiring.给所有的电线按照准则小心标上色标。