Custom, colored status bar example that changes colors depending the file format (in this case, "dos" is bad).

gistfile1.vim

" Colors taken from Solarized color scheme
let s:solr_grays = "ctermfg=240 ctermbg=235 guifg=#586E75 guibg=#073642"
let s:solr_warn  = "ctermfg=230 ctermbg=160 guifg=#FDF6E3 guibg=#DC322F"

exe 'hi! User1 ' . s:solr_grays
exe 'hi! User2 ' . s:solr_grays
exe 'hi! User3 ' . s:solr_grays
exe 'hi! User4 ' . s:solr_grays
exe 'hi! User5 ' . s:solr_grays
exe 'hi! User6 ' . s:solr_grays
exe 'hi! User7 ' . s:solr_grays
exe 'hi! User8 ' . s:solr_grays
exe 'hi! User9 ' . s:solr_grays
exe 'hi! User0 ' . s:solr_grays

function! CheckFileFormat()
  if &ff == 'dos'
    exe 'hi! User4 ' . s:solr_warn
    return 'FUCKING [DOS] FILE FORMAT'
  else
    return &ff
  endif
endfunction

set laststatus=2                                          "required for custom (visible) statusline
set statusline=                                           "GTFO, statusline
set statusline+=%7*\[%n]                                  "buffernr
set statusline+=%1*\ %<%F\                                "File+path
set statusline+=%2*\ %y\                                  "FileType
set statusline+=%3*\ %{''.(&fenc!=''?&fenc:&enc).''}      "Encoding
set statusline+=%3*\ %{(&bomb?\",BOM\":\"\")}\            "Encoding2
set statusline+=%4*\ %{CheckFileFormat()}\                "FileFormat (dos/unix..) 
"set statusline+=%5*\ %{&spelllang}\%{HighlightSearch()}\ "Spellanguage & Highlight on?
set statusline+=%8*\ %=\ row:%l/%L\ (%03p%%)\             "Rownumber/total (%)
set statusline+=%9*\ col:%03c\                            "Colnr
set statusline+=%0*\ \ %m%r%w\ %P\ \                      "Modified? Readonly? Top/bot.