Closest language to Haxe for syntax highlighting?

For syntax highlighting code snippets on sites (or when using tools) that do not offer a syntax highlighting format specifically for Haxe, what’s the next best language-highlighting-format to choose?

Haxe’s syntax is close to as3, java and c# so I guess one of those should be okay.
But there will be some edge cases.

Gotcha. Thanks, Valentin.