Wiktionary
color bar
n. (alternative spelling of colour bar English)
WordNet
color bar
n. barrier preventing blacks from participating in various activities with whites [syn: colour bar, color line, colour line, Jim Crow]
Usage examples of "color bar".
They didn't give a damn about the color bar-they'd look you in the eye and call you `comrade.
A jazzy three-color bar graph, the bars represented by stylized brushes, illustrated the phenomenal rise in prices brought by works of living artists.
A color bar appeared on the screen, and the officer quickly adjusted the videotape to the proper hue and tint.