Some Perl code unreadable with solarized dark

[tbm]

I use solarized dark. When I enable vim-rainbox there's some code that's barely readable. I marked some of the problematic spots:

My confirm is pretty standard. I see it with:

Plugin 'https://github.com/altercation/vim-colors-solarized'
Plugin 'https://github.com/frazrepo/vim-rainbow'

syntax on
set background=dark
colorscheme solarized
let g:solarized_termcolors = 256

autocmd FileType c,cpp,objc,objcpp,perl call rainbow#load()