Lovely shot; great composition and a great sky to go with it ...but; are the boats really yellow and are the clouds really purple...?
Seems lit by sodium lamps; and then you have taken a middle ground for wb between the sky and the boats...
Yes, the boats are lit by un-natural light. WB was set for daylight, thus the sky. I did a minor bit of adjusting to get this, which is exactly what I wanted. Kinda HDRish without the HDR.