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vim.o.background = "dark"
vim.cmd.colorscheme "rex"
NORMALinit.luaunixutf-80%0:2

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" 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,