colour bar noun3 •The segregation of people of different colour or race, especially any barrier to black people participating in activities with white people.That first morning at the firm, a pleasant young white secretary, Miss Lieberman, took me aside and said, ‘Nelson, we have no colour bar here at the law firm.’ — 1994 •A pattern of varying tonal density that enables visual and numeric comparisons to be made across multiple printed sheets or pages. •A layer of good jewellery-quality opal within a rough opal. formscolour bars
