v (intransitive|of an ink or dye) To spread from the intended location and stain the surrounding cloth or paper.
v (intransitive|copulative) To show one's group loyalty by showing (its associated color) in one's blood.
n In printing (1): a narrow edge around a page layout, to be printed but cut off afterwards (added to allow for slight misalignment, especially with pictures that should run to the edge of the finished sheet).