This is a good start, but could you try some modifications... please remove the gradient from the letters, and try more of a bright blue instead of the sunset type colours. Also, since we're located in a temperate zone and not the tropics, what about a different kind of tree instead of a palm?
I like the white trees much better. The green ones don't show up very well on the blue background. What about a single deciduous tree, and a slightly lighter blue?