diff --git a/autoload/limelight.vim b/autoload/limelight.vim
index 0a4cd86..3940770 100644
--- a/autoload/limelight.vim
+++ b/autoload/limelight.vim
@@ -138,7 +138,8 @@ function! s:dim(coeff)
   let synid = synIDtrans(hlID('Normal'))
   let fg = synIDattr(synid, 'fg#')
   let bg = synIDattr(synid, 'bg#')
-
+  let bg = bg == 'none' ? bg : 0
+  
   if has('gui_running') || has('termguicolors') && &termguicolors || has('nvim') && $NVIM_TUI_ENABLE_TRUE_COLOR
     if a:coeff < 0 && exists('g:limelight_conceal_guifg')
       let dim = g:limelight_conceal_guifg