Fix true color support issue

Some terminal, for example, xshell, does not support true colors. In this case, we should not set the termguicolors option.

1 files changed, 7 insertions, 1 deletions

diff --git a/ui.vim b/ui.vim
index 64b5c50..021c20a 100644
--- a/ui.vim
+++ b/ui.vim
@@ -4,7 +4,13 @@
 " support true colors! For a comprehensive list of terminals supporting true
 " colors, see https://github.com/termstandard/colors and
 " https://bit.ly/2InF97t)
-set termguicolors
+if exists("&termguicolors")
+    if $TERM == "xterm-256color"
+        set termguicolors
+    else
+        set notermguicolors
+    endif
+endif
 
 " Use dark background
 set background=dark