Pink, followed by "Dayglo" or "tennis ball" green-yellow.
I would reverse this but my problem is that I can never get that green-yellow one around here. My bag ends up being full of white and yellow with a pink or 2 thrown in. I wish they would make more in that yellow-green, at dusk or dawn there is no better color including glow discs (assuming the moon is up) and they work as well as pink all day also.