Little script for dimming/brightening screen colors

[chew-z]

Not an issue

Working late at night I like adjusting the screen brightness/contrast. Perhaps someone else will also find this little mapping useful.

On Mac F1/F2 special keys (pressed together with Fn key) Dim/Brighten screen so this mapping seems very natural.

" brighten/dim background - a'la macOS dim screen function keys
" 233 (darkest) ~ 239 (lightest) 252 (darkest) ~ 256 (lightest)
function! Seoul256Brighten()
    if g:seoul256_background == 239
        let g:seoul256_background = 252
    elseif g:seoul256_background == 256
        let  g:seoul256_background = 256
    else
        let g:seoul256_background += 1
    endif
    colo seoul256
endfunction
"
function! Seoul256Dim()
    if g:seoul256_background == 252
        let g:seoul256_background = 239
    elseif g:seoul256_background == 233
        let g:seoul256_background = 233
    else
        let g:seoul256_background -= 1
    endif
    colo seoul256
endfunction
"
nmap <F1> :call Seoul256Dim()<CR>
nmap <F2> :call Seoul256Brighten()<CR>