kien/rainbow_parentheses.vim — pull request #11 by DanielleSucher (2014-03-27 23:41:28+00:00)
Title: Add option to bold parentheses, defaulting to on

Bolding parentheses makes it easier to see and distinguish between the rainbow colors.

(Yes, I know you have another open pull request from a year ago on adding bolding. The big difference is that while that fork has diverged and removed all gui options, my version adds a bold option for gui as well as for cterm.)