diff --git a/src/Ngino.Server/wwwroot/admin/Ngino_logo_symbol.png b/src/Ngino.Server/wwwroot/admin/Ngino_logo_symbol.png
new file mode 100644
index 0000000..604de36
Binary files /dev/null and b/src/Ngino.Server/wwwroot/admin/Ngino_logo_symbol.png differ
diff --git a/src/Ngino.Server/wwwroot/admin/app.css b/src/Ngino.Server/wwwroot/admin/app.css
index 7dcd9a5..172cf2e 100644
--- a/src/Ngino.Server/wwwroot/admin/app.css
+++ b/src/Ngino.Server/wwwroot/admin/app.css
@@ -58,16 +58,12 @@ textarea {
 }
 
 .brand-mark {
-  display: grid;
-  place-items: center;
   width: 34px;
   height: 34px;
   border: 1px solid #4c5d74;
   border-radius: 6px;
   background: #223044;
-  color: #c8f2df;
-  font-weight: 800;
-  letter-spacing: 0;
+  object-fit: cover;
 }
 
 .brand strong,
diff --git a/src/Ngino.Server/wwwroot/admin/index.html b/src/Ngino.Server/wwwroot/admin/index.html
index 76713ae..d5005fd 100644
--- a/src/Ngino.Server/wwwroot/admin/index.html
+++ b/src/Ngino.Server/wwwroot/admin/index.html
@@ -10,7 +10,7 @@
   <div class="app-shell">
     <aside class="sidebar">
       <div class="brand">
-        <span class="brand-mark">RL</span>
+        <img class="brand-mark" src="/admin/Ngino_logo_symbol.png" alt="Ngino">
         <span>
           <strong>Ngino</strong>
           <small>Admin</small>