diff --git a/src/class/SSO/index.ts b/src/class/SSO/index.ts
index 51cd68a..23ab011 100644
--- a/src/class/SSO/index.ts
+++ b/src/class/SSO/index.ts
@@ -8,7 +8,7 @@ export const SSO = new GundaiWebSite("sso");
 export default SSO;
 
 SSO.rainbow.enable = function () {
-    this.bg.apply(".header_column", ".input_form", ".input_column");
+    this.bg.apply(".input_form");
     changeQueryInnerHTML(".product", "群馬大学ゲーミングサインオンシステム");
 
     // 二段階認証の自動送信
diff --git a/src/styles/sso.css b/src/styles/sso.css
index e69de29..00c906a 100644
--- a/src/styles/sso.css
+++ b/src/styles/sso.css
@@ -0,0 +1,14 @@
+.header_column,
+.input_column,
+.input_form th,
+#username_id_input,
+#password_input {
+    background: transparent !important;
+}
+
+#username_id_input,
+#password_input {
+    border: 1px solid #ccc !important;
+    border-radius: 5px !important;
+    padding: 5px !important;
+}