Blue Wednesday

"Now here's something I can really sink my teeth into." I said to myself. I could easily post twenty pictures today, but I'd like you to take a look here at some of the other entries for the Winter Colour Week. It's really pretty inspiring. Oh, and tomorrow is green. Couldn't we dedicate a whole week to the color green?

Blue

So, I'm taking another photography class and the first assignment is ... you guessed it, "blue." I have to choose my best shot to submit, and since I have such discerning and aesthetically advanced friends, I thought I'd turn to you to help me decide. Which of these images not only speaks to you of blue, but works compositionally as an image?