Near vermilion, one gets stained pink; near ink, one gets stained black.

解释 ( paraphrase )
经常靠近红色的东西，就会变成红的；经常靠近黑色的东西就会变成黑的。朱和赤都表示红色。
这条谚语告诉我们：经常接近好人就容易变好，经常接近坏人就容易变坏。强调社会环境（特别是朋友、亲属等关系密切的人）对一个人的影响。

This proverbs tells us that one who associates with good people will learn to be good, while one who associates with bad people will learn to be bad. One is greatly influenced by one's close relationships and surroundings.

近：接近，靠近。
      To be closed to.

朱、赤：都表示红色。
            “朱” and “赤” are both shades of red.

墨：用来代表黑色的东西。
      Ink, referring to the color black.

近义词 ( synonym )
① 潜移默化
② 耳濡目染

造句 ( example )
正所谓“近朱者赤，近墨者黑”，记住，在学校一定要常常和好同学沟通，别和那些坏孩子在一起玩。