I would have loved the Z3C in purple.
Unfortunately OEMs choose the colours much like fashion stylists. They see which are the colours that are "in" for that year and go with it.
Green and Orange are the colours for 2014. Sony isn't the only company to go with them, Nokia did too.
I find it a bit annoying as I really liked the purple Xperias. Oh well.
I pre-ordered my Z3C in black. I always go for black phone 'cause that way I never risk getting sick of the colour.
But the Z3C does look cool in fire tones (I think the phone is fire-red on the back and fire-orange on the frame).