I am a strong supporter of blue, but I think that the blue is just absolutely perfect!
The name of the pattern is "Ocean Waves" and that touch of blue absolutely helps your eye follow the wave.
I wouldn't change a thing!
You may not be the fan of blue that I am, so I am wondering if another sea color such as aqua or green would make you feel more comfortable.
I tried imagining what it would look like if you put a brown in there, and the thing just clunked!
In my humble opinion <g>