I would disagree, the blue color is very easy to miss. A lighter blue would be better.
~ @SuperDyl
The light blue is taken by staff. Because the msg-ing color only applies to /msg, it should be easily recognizable and stand out from the other chat colors. I see no need for a change.
As for the original suggestion, I don't really care for a notification, and it doesn't seem especially important right now. I wouldn't mind it if I could toggle it, but I just don't see it's general need.