diff --git a/.vim/colors/mycolor.vim b/.vim/colors/mycolor.vim
index 8d43cbb..6a8d13e 100644
--- a/.vim/colors/mycolor.vim
+++ b/.vim/colors/mycolor.vim
@@ -88,6 +88,7 @@ endif
 	highlight! ErrorMsg       ctermfg=Red         ctermbg=Black
 endif
 
+" to be used with set colorcolumn=81
 highlight ColorColumn ctermbg=236
 
 " define whitespaces at end of line as bad whitespaces