diff --git a/colors/solarized8.vim b/colors/solarized8.vim
index a45b5f4..9ea0f99 100644
--- a/colors/solarized8.vim
+++ b/colors/solarized8.vim
@@ -4,9 +4,9 @@
 " Maintainer:   Lifepillar <lifepillar@lifepillar.me>
 " URL:          https://github.com/lifepillar/vim-solarized8
 " License:      OSI approved MIT license
-" Last Change:  2025 May 26
+" Last Change:  2025 May 28
 
-" Generated by Colortemplate v3.0.0-beta2
+" Generated by Colortemplate v3.0.0-beta3
 
 hi clear
 let g:colors_name = 'solarized8'
@@ -420,6 +420,10 @@ if &background == 'dark'
       hi SpecialKey guifg=#073642 guibg=NONE guisp=NONE gui=reverse cterm=reverse
       hi Title guifg=#586e75 guibg=NONE guisp=NONE gui=bold cterm=bold
     endif
+
+    if empty(&t_Co)
+      finish
+    endif
   endif
 
   if str2nr(&t_Co) >= 256
@@ -1554,6 +1558,10 @@ if &background == 'light'
       hi SpecialKey guifg=#eee8d5 guibg=NONE guisp=NONE gui=bold cterm=bold
       hi Title guifg=#93a1a1 guibg=NONE guisp=NONE gui=bold cterm=bold
     endif
+
+    if empty(&t_Co)
+      finish
+    endif
   endif
 
   if str2nr(&t_Co) >= 256
diff --git a/colors/solarized8_flat.vim b/colors/solarized8_flat.vim
index 4b2bece..2dfea4e 100644
--- a/colors/solarized8_flat.vim
+++ b/colors/solarized8_flat.vim
@@ -4,9 +4,9 @@
 " Maintainer:   Lifepillar <lifepillar@lifepillar.me>
 " URL:          https://github.com/lifepillar/vim-solarized8
 " License:      OSI approved MIT license
-" Last Change:  2025 May 26
+" Last Change:  2025 May 28
 
-" Generated by Colortemplate v3.0.0-beta2
+" Generated by Colortemplate v3.0.0-beta3
 
 hi clear
 let g:colors_name = 'solarized8_flat'
@@ -397,6 +397,10 @@ if &background == 'dark'
       hi SpecialKey guifg=#073642 guibg=NONE guisp=NONE gui=reverse cterm=reverse
       hi Title guifg=#586e75 guibg=NONE guisp=NONE gui=bold cterm=bold
     endif
+
+    if empty(&t_Co)
+      finish
+    endif
   endif
 
   if str2nr(&t_Co) >= 256
@@ -1436,6 +1440,10 @@ if &background == 'light'
       hi SpellRare guifg=#2aa198 guibg=NONE guisp=#2aa198 gui=undercurl cterm=undercurl
       hi Title guifg=#93a1a1 guibg=NONE guisp=NONE gui=bold cterm=bold
     endif
+
+    if empty(&t_Co)
+      finish
+    endif
   endif
 
   if str2nr(&t_Co) >= 256
diff --git a/colors/solarized8_high.vim b/colors/solarized8_high.vim
index ca6104e..0603313 100644
--- a/colors/solarized8_high.vim
+++ b/colors/solarized8_high.vim
@@ -4,9 +4,9 @@
 " Maintainer:   Lifepillar <lifepillar@lifepillar.me>
 " URL:          https://github.com/lifepillar/vim-solarized8
 " License:      OSI approved MIT license
-" Last Change:  2025 May 26
+" Last Change:  2025 May 28
 
-" Generated by Colortemplate v3.0.0-beta2
+" Generated by Colortemplate v3.0.0-beta3
 
 hi clear
 let g:colors_name = 'solarized8_high'
@@ -416,6 +416,10 @@ if &background == 'dark'
       hi SpellRare guifg=#2aa198 guibg=NONE guisp=#2aa198 gui=undercurl cterm=undercurl
       hi Title guifg=#657b83 guibg=NONE guisp=NONE gui=bold cterm=bold
     endif
+
+    if empty(&t_Co)
+      finish
+    endif
   endif
 
   if str2nr(&t_Co) >= 256
@@ -1518,6 +1522,10 @@ if &background == 'light'
       hi SpecialKey guifg=#eee8d5 guibg=NONE guisp=NONE gui=bold cterm=bold
       hi Title guifg=#93a1a1 guibg=NONE guisp=NONE gui=bold cterm=bold
     endif
+
+    if empty(&t_Co)
+      finish
+    endif
   endif
 
   if str2nr(&t_Co) >= 256
diff --git a/colors/solarized8_low.vim b/colors/solarized8_low.vim
index a874886..4801d0f 100644
--- a/colors/solarized8_low.vim
+++ b/colors/solarized8_low.vim
@@ -4,9 +4,9 @@
 " Maintainer:   Lifepillar <lifepillar@lifepillar.me>
 " URL:          https://github.com/lifepillar/vim-solarized8
 " License:      OSI approved MIT license
-" Last Change:  2025 May 26
+" Last Change:  2025 May 28
 
-" Generated by Colortemplate v3.0.0-beta2
+" Generated by Colortemplate v3.0.0-beta3
 
 hi clear
 let g:colors_name = 'solarized8_low'
@@ -411,6 +411,10 @@ if &background == 'dark'
       hi SpecialKey guifg=#073642 guibg=NONE guisp=NONE gui=reverse cterm=reverse
       hi Title guifg=#586e75 guibg=NONE guisp=NONE gui=bold cterm=bold
     endif
+
+    if empty(&t_Co)
+      finish
+    endif
   endif
 
   if str2nr(&t_Co) >= 256
@@ -1510,6 +1514,10 @@ if &background == 'light'
       hi SpellRare guifg=#2aa198 guibg=NONE guisp=#2aa198 gui=undercurl cterm=undercurl
       hi Title guifg=#93a1a1 guibg=NONE guisp=NONE gui=bold cterm=bold
     endif
+
+    if empty(&t_Co)
+      finish
+    endif
   endif
 
   if str2nr(&t_Co) >= 256
diff --git a/doc/solarized8.txt b/doc/solarized8.txt
index cc25e47..7ee788f 100644
--- a/doc/solarized8.txt
+++ b/doc/solarized8.txt
@@ -1,4 +1,4 @@
-*solarized8.txt*	For Vim version 9	Last change: 2025 May 26
+*solarized8.txt*	For Vim version 9	Last change: 2025 May 28
 
 
 			Solarized 8 color scheme