" Foreground colors
let s:black           = { "gui": "#303030", "cterm": "236" }
let s:light_black     = { "gui": "#585858", "cterm": "240" }
let s:blue_fg         = { "gui": "#00005f", "cterm":  "17" }
let s:green_fg        = { "gui": "#005f00", "cterm":  "22" }
let s:cyan_fg         = { "gui": "#005f5f", "cterm":  "23" }
let s:red_fg          = { "gui": "#5f0000", "cterm":  "52" }
let s:purple_fg       = { "gui": "#5f005f", "cterm":  "53" }
let s:yellow_fg       = { "gui": "#5f5f00", "cterm":  "58" }

" Background colors
let s:white           = { "gui": "#ffffff", "cterm": "231" }
let s:light_gray      = { "gui": "#eeeeee", "cterm": "255" }
let s:md_gray         = { "gui": "#dadada", "cterm": "253" }
let s:blue_bg         = { 'gui': '#d7d7ff', 'cterm': '189' }
let s:green_bg        = { 'gui': '#d7ffd7', 'cterm': '194' }
let s:cyan_bg         = { 'gui': '#d7ffff', 'cterm': '195' }
let s:red_bg          = { 'gui': '#ffd7d7', 'cterm': '224' }
let s:purple_bg       = { 'gui': '#ffd7ff', 'cterm': '225' }
let s:yellow_bg       = { 'gui': '#ffffd7', 'cterm': '230' }

" Color sets
let s:dark    = [ s:black.gui , s:md_gray.gui    , s:black.cterm , s:md_gray.cterm    ]
let s:light   = [ s:black.gui , s:light_gray.gui , s:black.cterm , s:light_gray.cterm ]
let s:blue    = [ s:black.gui , s:blue_bg.gui    , s:black.cterm , s:blue_bg.cterm    ]
let s:yellow  = [ s:black.gui , s:yellow_bg.gui  , s:black.cterm , s:yellow_bg.cterm  ]
let s:red     = [ s:black.gui , s:red_bg.gui     , s:black.cterm , s:red_bg.cterm     ]
let s:green   = [ s:black.gui , s:green_bg.gui   , s:black.cterm , s:green_bg.cterm   ]

let g:airline#themes#mono#palette = {}

let g:airline#themes#mono#palette.accents = {
      \ 'red': [ s:red_fg.gui , '' , s:red_fg.cterm , '' ],
      \ }

" Normal Mode
let g:airline#themes#mono#palette.normal = airline#themes#generate_color_map(s:blue, s:dark, s:light)

" Insert Mode
let g:airline#themes#mono#palette.insert = copy(g:airline#themes#mono#palette.normal)
let g:airline#themes#mono#palette.insert.airline_a = s:yellow
let g:airline#themes#mono#palette.insert.airline_z = s:yellow

" Replace Mode
let g:airline#themes#mono#palette.replace = copy(g:airline#themes#mono#palette.normal)
let g:airline#themes#mono#palette.replace.airline_a = s:red
let g:airline#themes#mono#palette.replace.airline_z = s:red

" Visual Mode
let g:airline#themes#mono#palette.visual = copy(g:airline#themes#mono#palette.normal)
let g:airline#themes#mono#palette.visual.airline_a = s:green
let g:airline#themes#mono#palette.visual.airline_z = s:green

" Inactive
let g:airline#themes#mono#palette.inactive = airline#themes#generate_color_map(s:light, s:light, s:light)