The grey and the orange used here are both the default theme colours for the HildonButton's value label.

http://maemo.org/api_refs/5.0/5.0-fi...tton-set-style will probably explain it better, but, in short, if you want the orange: <HildonButton>.set_style(hildon.BUTTON_STYLE_PICKE R)

Note: The button should only be made orange if pressing the button allows its value to be changed in some way...