bizdelnick, 1 year ago

You need to add class to this line:

<span style="color:#323232;">echo "submenu '$(gettext_printf "Advanced options for %s" "${OS}" | grub_quote)' $menuentry_id_option 'gnulinux-advanced-$boot_device_id' {"
</span>

Insert ${CLASS} before $menuentry_id_option:

<span style="color:#323232;">echo "submenu '$(gettext_printf "Advanced options for %s" "${OS}" | grub_quote)' ${CLASS} $menuentry_id_option 'gnulinux-advanced-$boot_device_id' {"
</span>