Reflective clothes, stripes, tape, or whatever, is exceedingly more effective at night than any bright color. It reflects back light directly to the source with a much lower scatter rate than cloth ever will. Even a bright white shirt can be tough to spot at night. The same can be said for blaze orange, hi-vis green and yellow, etc. Hi vis colors are meant for daytime, and work well then, as they contrast against almost every other color.