Pretty your GRUB loader

It is pretty easy to change default boot timeout and colors.

GRUB 1

Edit the following settings in /boot/grub/grub.cfg:

# Set a timeout, in seconds, before automatically booting 
# the default entry (normally the first entry defined).
timeout  2

# Pretty colours
color  light-blue/black light-cyan/black

GRUB 2

Disable graphical terminal /etc/default/grub:

# Uncomment to disable graphical terminal (grub-pc only)
GRUB_TERMINAL=console

Edit the settings in /etc/grub.d/05_debian_theme:

 ...

set_default_theme(){
     # Set the traditional Debian blue theme.
     #echo "${1}set menu_color_normal=cyan/blue"
     #echo "${1}set menu_color_highlight=white/blue"
     echo "${1}set menu_color_normal=light-gray/black"
     echo "${1}set menu_color_highlight=white/black"
}

Once finished issue the command to regenerate grub config files:

update-grub