(1) A dark colour line across the printed sheet.

(2) His Following the Colour Line was a pioneer study of prevailing racial attitudes, North and South.

(3) A heavy colour line or lines across rhe printed sheets occurred on rhe image areas, caused by the plate inkers set too hard against the plate.

(4) Roller streak: A heavy colour line or lines across rhe printed sheets occurred on rhe image areas, caused by the plate inkers set too hard against the plate.

(5) Willard's restoration of white dominance in heavyweight boxing in 1916 coincided with the re-establishment of the colour line.