moss.vim/syntax/moss.vim

if exists("b:current_syn")
  finish
endif

let b:current_syn = "moss"

syn match mossIdentifier "\v\$[a-z-]+"
syn match mossFunction "\v\@[a-z-]+"
syn match mossParen "\v[()]"
syn match mossProperty "\v\:[a-z-]+"

hi link mossIdentifier Identifier
hi link mossFunction Function
hi link mossParen Special
hi link mossProperty Constant