> For this study, we maximized the contrast by applying black paint. What remains to be tested is whether other color regimes will be equally effective, for exa

> For this study, we maximized the contrast by applying black paint. What remains to be tested is whether other color regimes will be equally effective, for example, red stripes as used for aviation warning purposes, green paint to reduce visibility (to humans) in the landscape or optical or holographic coatings. In the experiments by Hodos (2003), yellow and red, but especially green blades had slight—but nonsignificant—visibility advantages over black; which was therefore suggested be simplest and most effective to implement. It looks like they are hoping for the change to test other options, now that this first study shows promise.