altercation/vim-colors-solarized — pull request #35 by skwp (2011-12-07 08:31:22+00:00)
Title: improved SignColumn (showmarks gutter) and adde ShowMarks linkage to Diff colors

The SignColumn which appears to the left of the line number
column stood out in a very bad way because it was white.
I changed it to have the same appearance as the line number
column by using color linking. I also linked the ShowMarks
to DiffAdd and DiffChanged because those were nice already.