Style scaladoc slightly

[sellout]

I have a bunch of Scaladocs for different projects open for reference, but they all look identical, so I get lost sometimes. Something simple like using Typelevel red rather than the default blue would totally solve this.

[hamednourhani]

Hi @kailuowang . can i start from here with some guid ?

[rmehri01]

@kailuowang Hi, I'm wondering if this is still being done?