Add navy theme
Add navy theme

kbknapp/mdBook,superstring/mdBook,azerupi/mdBook,petehayes102/mdBook,petehayes102/mdBook,kbknapp/mdBook,kbknapp/mdBook,superstring/mdBook,kbknapp/mdBook,petehayes102/mdBook,superstring/mdBook,petehayes102/mdBook,azerupi/mdBook,azerupi/mdBook,superstring/mdBook,azerupi/mdBook