You have to ask yourself: what do highway road crews wear? Fuschia? Baby blue? White? Sunflowers? Stripes?......no, they wear screaming hi-visibility yellow or orange, with reflector tape for nightime.
Here in NY state, there was a study done a few years ago that caused the highway dept to switch from hi-vis orange and pink to hi-vis yellow because they found it was the most attention getting and visible color to motorists. Those guys do major safety studies and tests, -they want to make darned sure their road crew does not get hit by cars who don't see them.

Screaming yellow for me, thanks (with cozy merino wool base layers underneath!).