diff --git a/docs/javascripts/config.js b/docs/javascripts/config.js
index 1f372259..69f16a42 100644
--- a/docs/javascripts/config.js
+++ b/docs/javascripts/config.js
@@ -46,20 +46,25 @@ function setCookie(name, value) {
 }
 
 s_theme=getCookie("_theme");
-if(s_theme === undefined) s_theme = "default";
-document.body.setAttribute("data-md-color-scheme", s_theme)
-var name = document.querySelector("#__code_0 code span:nth-child(7)")
-name.textContent = s_theme
+if(s_theme !== undefined) {
+    document.body.setAttribute("data-md-color-scheme", s_theme)
+    var name = document.querySelector("#__code_0 code span:nth-child(7)")
+    name.textContent = s_theme
+}
 
 s_primary=getCookie("_primary_color");
-document.body.setAttribute("data-md-color-primary", s_primary);
-var name2 = document.querySelector("#__code_2 code span:nth-child(7)");
-if(s_primary !== null && name2 !== null) name2.textContent = s_primary.replace("-", " ");
+if(s_primary !== null) {
+    document.body.setAttribute("data-md-color-primary", s_primary);
+    var name2 = document.querySelector("#__code_2 code span:nth-child(7)");
+    if (s_primary !== null && name2 !== null) name2.textContent = s_primary.replace("-", " ");
+}
 
 s_accent=getCookie("_accent_color");
-document.body.setAttribute("data-md-color-accent", s_accent);
-var name3 = document.querySelector("#__code_3 code span:nth-child(7)");
-if(s_accent !== null && name3 !== null) name3.textContent = s_accent.replace("-", " ");
+if(s_accent !== null) {
+    document.body.setAttribute("data-md-color-accent", s_accent);
+    var name3 = document.querySelector("#__code_3 code span:nth-child(7)");
+    if (s_accent !== null && name3 !== null) name3.textContent = s_accent.replace("-", " ");
+}
 
 setTimeout(() => {
     let ls = document.querySelectorAll("chat-box");
diff --git a/mkdocs.yml b/mkdocs.yml
index 127705be..1b546e60 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -9,6 +9,9 @@ theme:
   logo: assets/logos.png
   favicon: assets/favicon.png
   language: zh
+  palette:
+    primary: deep orange
+    accent: deep orange
   features:
     - navigation.tabs
 extra_javascript: