How to change Plymouth background color

Change Plymouth background from purple to black

sudo gedit /lib/plymouth/themes/ubuntu-logo/ubuntu-logo.script

Edit the file to the following below:

Window.SetBackgroundTopColor (0.0, 0.00, 0.0);     # Nice colour on top of the screen fading to
Window.SetBackgroundBottomColor (0.0, 0.00, 0.0);  # an equally nice colour on the bottom


sudo update-initramfs -u


Reference:
http://askubuntu.com/questions/20829/how-can-i-change-the-purple-background-color-of-ubuntu-plymouth-boot-screen
Retrieved June 2013