Silliness. Of course black is less visible any time of day, in any conditions, anywhere. This is clear, obvious, and demonstrable fact.

Nonetheless, I do have one all black kit, though I restrict wearing it to big group rides and races. I don't care to assume additonal risk when riding alone when there are very attractive and comfy kits that up the viz factor.

Although a bit over-the-top, which is why I like it, I'm waiting for Elevengear.com to come back in stock on my size bib so I can get the full Two Tone Siren kit, which would be great for my solo rides: