Agust, please NO! Don't change it on the account of my comment. It was meant to be funny.
After your comment I looked at the theme and I do not like , but has given me another idea for this theme, I will do what is in red wine, that seems transparent.
Keep the wallpaper so that there is more contrast with the light cream color.
Thanks to your comment I think the theme will be more beautiful.
Definitely done with red wine, because the Gtk theme does not look right without the red wine in the e17.
Applications Gtk in e17Theme "Vision".