This is really well done! The colorscheme you chose was excellent...and by putting just her in color was a good decision. The foreground people make a nice frame, though I also wonder if they make the bottom valley too symmetrical.
:D Wonderful job.
my art: www.lunarpages.com/corridor
glups I dunno what I like most here, the soft coloring and inking, the color scheme, the hair of the girl, the faded background, the green eyes, but anyway, you did an extremely good job here o.o