...well, it's Type of green (somewhat), but nowhere near Yuuka's color scheme. And as for the outfit, Flandre, for the most part, has that same getup, but Flan's isn't plaid and there's no plaid up there.
PEOPLE, if a character has green hair is no immediate signal to start calling Yuuka, now If you want a non retarded reason to call a character Yuuka... post #1167707