参见：退色[tuìshǎi]

比喻人的思想、作风等随着环境、地位的变化改变了原来的面貌to be affected by changes in one's environment

• 当官不褪色，掌权不谋私。

  When acting as an official, do not be led astray by one's environment; when holding power, do not chase private gain.

• 离岗不褪色。

  Leave one's post but remain unaffected by the changes in one's environment.