Use node and node packages, like npm's color.js, from OCaml

c_text.ml

let () =
  let styled =
    Colors_js.colorize ~msg:"Hello World"
      ~styles:Colors_js.([Blue; Underline; White_bg])
      []
  in
  let with_actions =
    Colors_js.colorize ~msg:"Foo Bar Baz" ~styles:[] [Colors_js.America]
  in
  print_endline styled;
  print_endline with_actions

Compile and use with

$ ocamlfind ocamlc c_text.ml -linkpkg -package colors_js -o T.out 
$ js_of_ocaml T.out
$ node T.js