Why is the highlighting for OCaml so weird?

[ghulette]

Why is the syntax highlighting style so wacky? It's all underlines and italics and bright colors. I use other syntax highlighting vscode extensions for Haskell, Racket, Javascript, a bunch of scripting/config languages and they are all pretty consistent in terms of style -- why is this extension so odd?

It would be nice if by default the colors/style were more normal.