Picky, picky. I'm pretty sure manes at least came in quite intense shades.

Doing a Google image search on "my little pony" primary colours, on page eight there's a picture of Cap. And a picture of slavegirl Princess Leia Pony captioned "oh god why does this turn me on". I love the internet.

Also getting urge to mod a pony. There's a sweet Batgirl...