Theme

Colours

opal_window         : integer = $ffc0e0ff
opal_windowborder   : integer = $ff4080c0
opal_label          : integer = $ff000000
opal_labeldisabled  : integer = $ff707070

opal_widget         : integer = $ffffffff
opal_widgetdisabled : integer = $ffc0c0c0
opal_widgetborder   : integer = $ff4080c0
opal_widgetbordis   : integer = $ff707070
opal_widgettext     : integer = $ff000000
opal_widgettextdis  : integer = $ff707070
opal_widgethover    : integer = $ffffc000
opal_widgetselect   : integer = $ffffc000

opal_button         : integer = $ff80c0ff
opal_buttondisabled : integer = $ffa0a0a0
opal_buttonborder   : integer = $ff4080c0
opal_buttonbordis   : integer = $ff707070
opal_buttontext     : integer = $ff000000
opal_buttontextdis  : integer = $ff707070
opal_buttonhover    : integer = $ffffc000
opal_buttonhold     : integer = $ff306080
				

Font

opal_fontface       : string  = "Arial"
opal_fontsize       : integer = 10
opal_fontstyle      : integer = 0
				

You can change the theme and layout of the gui by changing these exported variables, BEFORE calling OpalInitialise. Messing with them afterwards is not recommended.