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