染苍染黄

Pinyin: rǎn cāng rǎn huáng Explanation: 苍：青色。比喻变化不定，反复无常。 Source: 《墨子·所染》见染丝者而叹曰‘染于苍则苍，染于黄则黄。’” Thesaurus:  Who keeps company with the wolf will learn to howl.