Change color of font in grub menu

set_default_theme(){
case $GRUB_DISTRIBUTOR in
Tanglu|Ubuntu|Kubuntu)
# Set a monochromatic theme for Tanglu/Ubuntu.
echo "${1}set menu_color_normal=white/blue"
echo "${1}set menu_color_highlight=green/white"

if [ -e /usr/share/plymouth/themes/default.grub ]; then
sed "s/^/${1}/" /usr/share/plymouth/themes/default.grub
fi
# For plymouth backward compatiblity. Can be removed
# after xenial.
if [ -e /lib/plymouth/themes/default.grub ]; then
sed "s/^/${1}/" /lib/plymouth/themes/default.grub
fi
;;
*)
# Set the traditional Debian blue theme.
echo "${1}set menu_color_normal=white/blue"
echo "${1}set menu_color_highlight=green/white"
;;
esac
}

- - , .
.