How do I add a theme for a new package?

[amno1]

I would like to add this little package to that giant macro full of themed packages you have in Solarized. What is the best way to do it? Do I fork solarized, add manually those two faces that the little package uses, and give you a PR, or is there some other method?

Sorry, for the noob question. I just need the red color to melt a bit better in the Solarized Dark. The default one hurts the eyes :).