vim-airline-themes/autoload/airline/themes/simple.vim

if exists('g:airline_powerline_fonts') && g:airline_powerline_fonts
  let g:airline_left_sep = ''
  let g:airline_right_sep = ''
endif

let s:bg = 232
let s:sepc = 236
let s:sepg = '#303030'

let s:N1 = [ '#00dfff' , '#080808' , 45  , s:bg ]
let s:N2 = [ '#ff5f00' , '#080808' , 202 , s:bg ]
let s:N3 = [ '#767676' , '#080808' , 243 , s:bg ]
let g:airline#themes#simple#normal = {
      \ 'mode':           [ s:N1[0]   , s:N1[1]   , s:N1[2] , s:N1[3] , 'bold' ] ,
      \ 'mode_separator': [ s:sepg    , s:N2[1]   , s:sepc  , s:N2[3] , 'bold' ] ,
      \ 'info':           [ s:N2[0]   , s:N2[1]   , s:N2[2] , s:N2[3] , ''     ] ,
      \ 'info_separator': [ s:sepg    , s:N3[1]   , s:sepc  , s:N3[3] , 'bold' ] ,
      \ 'statusline':     [ s:N3[0]   , s:N3[1]   , s:N3[2] , s:N3[3] , ''     ] ,
      \ 'file':           [ '#ff0000' , '#080808' , 160     , s:bg    , ''     ] ,
      \ 'inactive':       [ '#4e4e4e' , '#080808' , 239     , s:bg    , ''     ] ,
      \ }
let g:airline#themes#simple#normal_modified = copy(g:airline#themes#simple#normal)
let g:airline#themes#simple#normal_modified.info_separator = [ '#080808' , '#080808' , s:bg , s:bg , '' ]
let g:airline#themes#simple#normal_modified.statusline     = [ '#df0000' , '#080808' , 160 , s:bg , '' ]

let s:I1 = [ '#5fff00' , '#080808' , 82  , s:bg ]
let s:I2 = [ '#ff5f00' , '#080808' , 202 , s:bg ]
let s:I3 = [ '#767676' , '#080808' , 243 , s:bg ]
let g:airline#themes#simple#insert = {
      \ 'mode':           [ s:I1[0] , s:I1[1] , s:I1[2] , s:I1[3] , 'bold' ] ,
      \ 'mode_separator': [ s:sepg  , s:I2[1] , s:sepc  , s:I2[3] , 'bold' ] ,
      \ 'info':           [ s:I2[0] , s:I2[1] , s:I2[2] , s:I2[3] , ''     ] ,
      \ 'info_separator': [ s:sepg  , s:I3[1] , s:sepc  , s:I3[3] , 'bold' ] ,
      \ 'statusline':     [ s:I3[0] , s:I3[1] , s:I3[2] , s:I3[3] , ''     ] ,
      \ }
let g:airline#themes#simple#insert_modified = copy(g:airline#themes#simple#normal_modified)

let s:V1 = [ '#dfdf00' , '#080808' , 184 , s:bg ]
let s:V2 = [ '#ff5f00' , '#080808' , 202 , s:bg ]
let s:V3 = [ '#767676' , '#080808' , 243 , s:bg ]
let g:airline#themes#simple#visual = {
      \ 'mode':           [ s:V1[0] , s:V1[1] , s:V1[2] , s:V1[3] , 'bold' ] ,
      \ 'mode_separator': [ s:sepg  , s:V2[1] , s:sepc  , s:V2[3] , 'bold' ] ,
      \ 'info':           [ s:V2[0] , s:V2[1] , s:V2[2] , s:V2[3] , ''     ] ,
      \ 'info_separator': [ s:sepg  , s:V3[1] , s:sepc  , s:V3[3] , 'bold' ] ,
      \ 'statusline':     [ s:V3[0] , s:V3[1] , s:V3[2] , s:V3[3] , ''     ] ,
      \ }
let g:airline#themes#simple#visual_modified = copy(g:airline#themes#simple#normal_modified)