scoutersteve - nice pick w. the bungee net. Prijon makes some of their boats w.something similiar. Always thought it was a nice touch.
LOL Red gelcoat doesn't scratch any easier than yellow - the white layup underneath just contrasts more. Same maker, same thickness of gel coat. Esp. Current Designs who vacuum bags their composite boat bodies to the exceptionally slim but strong hulls & decks they are known for.
I have a CD Suka in red over white, orange seam, btw '-)
And a North Shore Fuego red over white, black seam.
Didn't get to pick, but I like red.
As to visibility searched for the relevant USCG study and couldn't find it, but here's what I remember:
searching for small craft via airplane, the USCG rated these colors as most visible: yellow, orange, red, and robin's egg blue (that last was surprising)
White hulls and white decks get lost in whitecaps, so an overturned kayak is hard to spot.
It is true that colors like red, dark green, dark blue, black & purple are harder to spot in fading light.
SeaKayaker also did its own study on visibility incl. color in 2008 IIRC.
AFA visibility, kayaks decks are very low to the water and their color is secondary to a bright colored PFD, and/or a hat, adding bright colored paddles or silver reflective stickers on any paddle. I've talked to fishermen in many points along the Great Lakes & what they see first are the paddles moving, so reflective stickers on bright paddles show up first due to motion and reflection.
For night time visibility, SOLAS tape has been used by mariners and SAR groups for years on boats, PFDs (the better designs have this) and paddles. When a light is shined on SOLAS tape it can be seen 1/4 mile away.
There is some DOT approved automotive tape that is highly reflective as well. Haven't tried it.
Finally, in the big picture of avoiding collisions, bright colors are more of a passive solution. Kayaks are so low to the water that they are not readily seen by any other people in vessels, including recreational boaters and professional mariners.
Being aware, agile and kayaking in a pod using knowledge of shipping lanes, buoys, etc. counts far more than the color of the boat or anything the paddler and the boat are wearing.