diff --git a/templates/index.html b/templates/index.html
index ba7d170..12b4a33 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -104,7 +104,7 @@ body {
 
 /* Calculator Styles */
 .calculator-btn {
-    background: var(--primary);
+    background: #0B6623; /* British Racing Green */
     color: white;
     border: none;
     border-radius: 8px;
@@ -121,7 +121,7 @@ body {
 }
 
 .calculator-btn:hover {
-    background: var(--primary-dark);
+    background: #0A5A1E; /* Dunkleres British Racing Green für Hover */
 }
 
 .calculator-btn:focus {