How to get rid of purple background color in newt apps?
Solution 1:
Took a while to figure out, turns out symlink for newt apps color palette has been changed:
http://cosmicb.no/2011/10/05/getting-rid-of-ubuntu-violet-colors/
$ ls -l /etc/alternatives/newt-palette
lrwxrwxrwx 1 root root 26 Dec 28 2014 /etc/alternatives/newt-palette -> /etc/newt/palette.ubuntu
To put it back :
$ sudo ln -sf /etc/newt/palette.original /etc/alternatives/newt-palette