This is "Mayan Smoke", a pleasant and ergonomic light-background color scheme, designed for long hours of coding and working. The UI elements are muted without being drab, the syntax elements are colorful without being garish, and the background is relaxing without being soporific. It is of a low-enough contrast so as not to cause eye-burn, but high-enough contrast so as not to cause eye-strain. The syntax coloration offers just a little higher resolution than most, distinguishing between class names vs. functions, strings and numbers vs. other constants, etc.
Many of the colors in this color scheme are drawn from Mayan murals, paintings and codices, and thus the name.
Click on each of the images below for a larger view.
You can download the color scheme from the Vim site.