colour-coded
adjective UK (US color-coded) uk/ˈkʌl.əˌkəʊ.dɪd/ us/ˈkʌl.ɚˌkoʊ.dɪd/
以色彩作区别的；以色彩划分的
If a set of objects such as books or wires are colour-coded, they are in different colours so that people can recognize them as being different or separate.