...ok, well two things:
1. You have little control over that, no matter what you do. Sorry, that's the truth. Even a re-ward mirror does little good, it will only make you feel better psychologically. If that works for you, use it.
2. Again, CONTRAST. The driver is looking forward at a landscape. Do you contrast with the landscape? Is your kit's pattern distinct from the background? Then you will be seen. Again, color does not make much of a difference. It could be a black & white pattern, it could be a hi-viz pattern, it does not make any difference at all so long as there is a clear contrast to the pattern and it is in contrast with the background (where you are riding)
Just think about it. Heck, go outside and look around you. Notice things that are in motion (even birds!)... It doesn't matter if the object is moving in the same direction as you or not, you will notice if it there is... drumroll please
Easiest example to think of is, sadly, cars. The next time you are driving on a highway and all the cars are moving in the same direction at the same relative speed (ie, no one is speeding through and weaving about), you will notice that the cars that are the *most* visible are the ones with the *most* contrast to the horizon or highway. The grey cars or cars that match the skyline will be the least visible.
Asphalt/Cement is grey? Grey cars less visible.
Horizon blue? Sky-blue cars less visible.
Horizon green with pastures or trees? Green cars less visible.
Cars that are red? Visible... unless the sky is red or the pavement is red... which would be a bad thing and I'd be driving in the other direction if that were the case.
Cars that are any other color? Just as visible as the red cars.
Cars that are white? Medium, average visibility on most average days because they offer average contrast to the environment... nothing startling, but o.k. stuff. In Snowy conditions? Bad of course.
Cars with contrast in them (like trim, tinted windows contrasting with body color, or vehicle wrap/advertising)? Always visible.
If all the cars were hi-viz colors it wouldn't make one damn difference in visibility... except that all the cars would suddenly be visible in contrast to the background. That's it. Cars would actually be less visible with each other (ie, you would be less likely to tell if a car made a sudden move) because hi-viz colors are limited and there is, again... wait for it....
|| Other projects in the works.