Juro, I'm currently using a Sci Anglers wet tip express 375 Grain on a 10 weight. It has a grey head and red running line.
I was going to say that I don't pay any attention to the color break, but after thinking about your example above, I can think of a few times sight fishing when I've used the color break as a reference to pick up and recast. I hadn't really thought of that application before, but now that you bring it up, it makes sense.
I don't think the color break in an intermediate would be a deal breaker for me, but I could now see it swinging the decision between to similar lines.