diff --git a/htdocs/core/modules/commande/doc/pdf_einstein.modules.php b/htdocs/core/modules/commande/doc/pdf_einstein.modules.php
index 7d38fe03d2de1b3157902b760305a2384ba2ce2f..244e78caacb23e98576e43de23860928d92bb8a3 100644
--- a/htdocs/core/modules/commande/doc/pdf_einstein.modules.php
+++ b/htdocs/core/modules/commande/doc/pdf_einstein.modules.php
@@ -483,7 +483,7 @@ class pdf_einstein extends ModelePDFCommandes
 						$this->localtax2[$localtax2_type][$localtax2_rate]+=$localtax2ligne;
 
 					if (($object->lines[$i]->info_bits & 0x01) == 0x01) $vatrate.='*';
-					if (! isset($this->tva[$vatrate])) 				$this->tva[$vatrate]='';
+					if (! isset($this->tva[$vatrate])) 				$this->tva[$vatrate]= 0;
 					$this->tva[$vatrate] += $tvaligne;
 
 					// Add line
diff --git a/htdocs/theme/eldy/style.css.php b/htdocs/theme/eldy/style.css.php
index 76cbad28f00d186a3b34ce0c0e947125e96b0ec0..d03ff95a50f47feef098be2613d5045fb532f06d 100644
--- a/htdocs/theme/eldy/style.css.php
+++ b/htdocs/theme/eldy/style.css.php
@@ -158,25 +158,25 @@ if (! empty($user->conf->THEME_ELDY_ENABLE_PERSONALIZED))
 
 // Set text color to black or white
 $tmppart=explode(',',$colorbackhmenu1);
-$tmpval=(! empty($tmppart[1]) ? $tmppart[1] : '')+(! empty($tmppart[2]) ? $tmppart[2] : '')+(! empty($tmppart[3]) ? $tmppart[3] : '');
+$tmpval=(! empty($tmppart[1]) ? $tmppart[1] : 0)+(! empty($tmppart[2]) ? $tmppart[2] : 0)+(! empty($tmppart[3]) ? $tmppart[3] : 0);
 if ($tmpval <= 360) $colortextbackhmenu='FFFFFF';
 else $colortextbackhmenu='000000';
 
 $tmppart=explode(',',$colorbackvmenu1);
-$tmpval=(! empty($tmppart[1]) ? $tmppart[1] : '')+(! empty($tmppart[2]) ? $tmppart[2] : '')+(! empty($tmppart[3]) ? $tmppart[3] : '');
+$tmpval=(! empty($tmppart[1]) ? $tmppart[1] : 0)+(! empty($tmppart[2]) ? $tmppart[2] : 0)+(! empty($tmppart[3]) ? $tmppart[3] : 0);
 if ($tmpval <= 360) { $colortextbackvmenu='FFFFFF'; }
 else { $colortextbackvmenu='000000'; }
 
 $tmppart=explode(',',$colorbacktitle1);
 if ($colortexttitle == '')
 {
-    $tmpval=(! empty($tmppart[1]) ? $tmppart[1] : '')+(! empty($tmppart[2]) ? $tmppart[2] : '')+(! empty($tmppart[3]) ? $tmppart[3] : '');
+    $tmpval=(! empty($tmppart[1]) ? $tmppart[1] : 0)+(! empty($tmppart[2]) ? $tmppart[2] : 0)+(! empty($tmppart[3]) ? $tmppart[3] : 0);
     if ($tmpval <= 360) { $colortexttitle='FFFFFF'; $colorshadowtitle='888888'; }
     else { $colortexttitle='000000'; $colorshadowtitle='FFFFFF'; }
 }
 
 $tmppart=explode(',',$colorbacktabcard1);
-$tmpval=(! empty($tmppart[1]) ? $tmppart[1] : '')+(! empty($tmppart[2]) ? $tmppart[2] : '')+(! empty($tmppart[3]) ? $tmppart[3] : '');
+$tmpval=(! empty($tmppart[1]) ? $tmppart[1] : 0)+(! empty($tmppart[2]) ? $tmppart[2] : 0)+(! empty($tmppart[3]) ? $tmppart[3] : 0);
 if ($tmpval <= 340) { $colortextbacktab='FFFFFF'; }
 else { $colortextbacktab='111111'; }