colour bar
noun
1
- a social system in which black people are denied access to the same rights, opportunities, and facilities as white people肤色障碍, 种族障碍（黑人不得享受白人可享受的权利和机会, 不得使用白人可使用的公共设施的种族歧视制度）。
2
- a strip on printed material or a screen display showing a range of colours, used to ensure that all colours are printed or displayed correctly色条（印刷品或屏幕显示上有各种颜色标志的狭长条, 用于确保全部色彩的印刷或显示均正确无误）。