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vim.o.background = "light"
vim.cmd.colorscheme "parchment-manuscript"
" Returns true if the color hex value is light
function! IsHexColorLight(color) abort
  let l:raw_color = trim(a:color, '#')
  let l:red = str2nr(substitute(l:raw_color, '.{0}(.{2})', '1', 'g'), 16)
  let l:green = str2nr(substitute(l:raw_color, '.{2}(.{2}).{2}', '1', 'g'), 16)
  let l:blue = str2nr(substitute(l:raw_color, '.{4}(.{2})', '1', 'g'), 16)
  let l:brightness = ((l:red * 299) + (l:green * 587) + (l:blue * 114)) / 1000
  return l:brightness > 155
endfunction
NORMALparchment-manuscriptunixutf-860%9:15