近朱者赤，近墨者黑
jìn​zhū​zhě​chì​jìn​mò​zhě​hēi

influenced by one's company

近朱者赤，近墨者黑 jìn​zhū​zhě​chì​jìn​mò​zhě​hēi
influenced by one's company
Literally meaning those who handle cinnabar are stained red and those who work with ink are stained black, this idiom describes how a person's character or habits are influenced by the people they associate with or the environment they are in.
one takes the color of one's company
you are the product of your environment; proximity to good things makes one good, proximity to bad things makes one bad

Cross-References

Same as