diff --git a/htdocs/theme/yellow/yellow.css b/htdocs/theme/yellow/yellow.css
index 4a9b12c9b75..ba069ec4bdc 100644
--- a/htdocs/theme/yellow/yellow.css
+++ b/htdocs/theme/yellow/yellow.css
@@ -21,7 +21,7 @@
 body 
 {
   background: #ebebe0; 
-  font-family: Helvetica, Verdana; font-size: 12px; 
+  font-family: sans-serif; font-size: 1.0em; 
 }
 /*
  *   Menu superieur
@@ -82,21 +82,21 @@ div.menus {
 .menu 
 { 
   background: #ccccb3; 
-  font-family: Helvetica, Verdana; font-size: 1.0em; font-weight: bold; 
+  font-size: 1.0em; font-weight: bold; 
   color: #000000; 
   text-decoration: none }
 
 .menusel
 { 
   background: #bbbb88; 
-  font-family: Helvetica, Verdana; font-size: 1.0em; font-weight: bold; 
+  font-size: 1.0em; font-weight: bold; 
   color: #000000; 
   text-decoration: none }
 
 .submenu 
 { 
   background: #ccccb3; 
-  font-family: Helvetica, Verdana; font-size: 1.0em;
+  font-size: 1.0em;
   color: #000000; 
   text-decoration: none }
 
@@ -108,7 +108,7 @@ a.impayee { font-weight: bold }
  */
 
 a.leftmenu { 
-             font-family: Helvetica, Verdana; 
+             
              font-size: 1.0em; 
              font-weight: bold; 
              color: #202020; 
@@ -129,7 +129,7 @@ td.barre_select {
                   }
 
 div.titre { 
-            font-family: Helvetica, Verdana; 
+            
             font-size: 1.0em; 
             font-weight: bold; 
             color: #666633; 
@@ -146,7 +146,7 @@ tr.liste_titre {
 
 tr.pair { 
           background: #dcdcb3; 
-          font-family: Helvetica, Verdana; 
+          
           font-size: 1.0em; 
           }
 
@@ -167,7 +167,6 @@ tr.box_titre {
 
 tr.box_pair { 
               background: #dcdcb3; 
-              font-family: Helvetica, Verdana; 
               font-size: 0.9em; 
               }