Ambiance use purple color them for computer/show desktop icons.
Will use orange icon theme for all, if use Human theme+ambiance windows border

Human theme with Ambiance button

install 
human-theme
on the system->preference, select select Human
click on [customize]
On [Windows border], select Ambiance

On terminal
gconf-editor
On
apps->metacity->general
[button_layout]
Use right button on mouse over item to select "edit key"
change button order
menu:minimize,maximize,close
to
close,minimize,maximize:menu

It's all.
