Copy. I thought you meant that you would look at the color pattern to determine which way the line was running, sort of like firemen follow the unidirectional fittings on their hoses to find their way back out of a smoke-filled building.

Using salsa as an example, on a H16 jib sheet (single line, run through cleats mounted on the front crossbar), the arrows would point towards one cleat and away from the other. Non-pointed flecks could do the same, as long as there are at least three colors (and you train yourself to remember the pattern, such as R-Y-B vs B-Y-R).

Mike