I like the blue on the 2003 400s. However, I did not like the same blue on the 650. I think it has to do with the longer narrower look of the 400. I was going to get a blue 400, but I decided to get a 2004 and the 2004 blue is a new color. From the pictures I saw, it is not a attractive as the 2003. I ordered a Silver 2004 400 to be safe. As far as visibility, there maybe not be much difference. Blue is darker, but silver is very hard to see on a sunny day also.