Ubuntu Splash Screen Background

I am not new to Ubuntu or anything, but I am just wanting to dabble a little deeper into Ubuntu's Inner workings. I was wondering if somebody could tell me how I can set a picture as Ubuntu's Splash Screen Background. I am not talking about Grub. Grub I have already done. I am talking about the screen after Grub. I have been able to turn it from Purple (Ugly) to Black. But since it is Christmas time I would like to be able to set a Christmas background as the splash screen.

I know I can change the color byusing the command sudo gedit /lib/plymouth/themes/ubuntu-logo/ubuntu-logo.script

Thanks in advance.

Picture of What I want to change

2 Answers

The screen you are talking about covering the kernel booting messages is generated by plymouth. You can find detailed information about plymouth at the ubuntu wiki. To tweak it have a look at section "Splash Theme".

Tested in Ubuntu 18.04 (GNOME).

1. backup and open file in editor (e.g. Sublime):

   sudo cp /usr/share/plymouth/themes/ubuntu-logo/ubuntu-logo.script /usr/share/plymouth/themes/ubuntu-logo/ubuntu-logo.script.backup
   sudo subl /usr/share/plymouth/themes/ubuntu-logo/ubuntu-logo.script

2. find

   # #2c001e --> 0.16, 0.00, 0.12
   #
   Window.SetBackgroundTopColor (0.16, 0.00, 0.12); # Nice colour on top of the screen fading to
   Window.SetBackgroundBottomColor (0.16, 0.00, 0.12); # an equally nice colour on the bottom

   and change to

   # #597301 --> 0.35, 0.45, 0.00
   #
   Window.SetBackgroundTopColor (0.35, 0.45, 0.00); # Nice colour on top of the screen fading to
   Window.SetBackgroundBottomColor (0.35, 0.45, 0.00); # an equally nice colour on the bottom

3. Repeat after every system update.

I changed my background from purple #2c001e to green #597301 in this example. How did I calculate the right values?

• #597301 is a hexademical color representation: 0x59 red, 0x73 green, 0x01 blue.
• now divide by 255 (0xff):
  • 0x59 / 0xff = 0.35
  • 0x73 / 0xff = 0.45
  • 0x01 / 0xff = 0.00