diff --git a/_layouts/default.html b/_layouts/default.html
index 40a8b12..74e8914 100644
--- a/_layouts/default.html
+++ b/_layouts/default.html
@@ -22,33 +22,30 @@
     <style>
         .language-shell.highlighter-rouge {
             /* New styles for Shell code */
-            background-color: #00326d; /* Example background color */
+            background-color: #d5e3f3; /* Example background color */
             color: #333; /* Example text color */
             padding: 10px; /* Example padding */
-            border: 1px solid #ccc; /* Example border */
             font-family: 'Courier New', monospace; /* Monospaced font for code */
             /* Add other styling properties as needed */
         }
         .language-python {
             /* New styles for Python code */
-            background-color: #00326d; /* Light grey background */
+            background-color: #d5e3f3; /* Light grey background */
             color: #202020; /* Dark grey text color */
             padding: 10px; /* Padding around the code block */
-            border: 1px solid #ccc; /* Example border */
             font-family: 'Courier New', monospace; /* Monospaced font for code */
             /* Add other styling properties as needed */
         }
         .language-matlab {
             /* New styles for MATLAB code */
-            background-color: #00326d; /* Light yellow background */
+            background-color: #d5e3f3; /* Light yellow background */
             color: #0052cc; /* MATLAB blue text color */
             padding: 10px; /* Padding around the code block */
-            border: 1px solid #ccc; /* Example border */
             font-family: 'Courier New', monospace; /* Monospaced font for code */
             /* Add other styling properties as needed */
         }
-        .highlight .hll { background-color: #00326d }
-        .highlight  { background: #00326d; }
+        .highlight .hll { background-color: #d5e3f3 }
+        .highlight  { background: #d5e3f3; }
         .highlight .c { color: #408080; font-style: italic } /* Comment */
         .highlight .err { border: 1px solid #FF0000 } /* Error */
         .highlight .k { color: #008000; font-weight: bold } /* Keyword */