diff --git a/core/core.php b/core/core.php
index 894146d2..92e7a6d4 100644
--- a/core/core.php
+++ b/core/core.php
@@ -28,7 +28,7 @@ class common {
 	const GROUP_ADMIN = 3;
 	// Numéro de version de développement :/
 	// Désactive l'update auto
-	const ZWII_VERSION = '9.0.00-dev20';
+	const ZWII_VERSION = '9.0.00-dev21';
 	// Numéro de version stable
 	//const ZWII_VERSION = '9.0.00';
 
diff --git a/core/module/theme/theme.php b/core/module/theme/theme.php
index d6de85a8..9a8a5393 100755
--- a/core/module/theme/theme.php
+++ b/core/module/theme/theme.php
@@ -298,8 +298,14 @@ class theme extends common {
 	public function header() {
 		// Soumission du formulaire
 		if($this->isPost()) {
+			// Si une image est positionnée, l'arrière en transparent.
+			if ($this->getInput('themeHeaderImage') === "") {		
+				$themeHeaderBackgroundColor = $this->getInput('themeHeaderBackgroundColor'); } 
+				else { 
+				$themeHeaderBackgroundColor = 'rgba(0, 0, 0, 0)'; 
+			}
 			$this->setData(['theme', 'header', [
-				'backgroundColor' => $this->getInput('themeHeaderBackgroundColor'),
+				'backgroundColor' => $themeHeaderBackgroundColor,
 				'font' => $this->getInput('themeHeaderFont'),
 				'fontSize' => $this->getInput('themeHeaderFontSize'),
 				'fontWeight' => $this->getInput('themeHeaderFontWeight'),
diff --git a/core/module/theme/view/header/header.js.php b/core/module/theme/view/header/header.js.php
index 7185a25e..949d353c 100755
--- a/core/module/theme/view/header/header.js.php
+++ b/core/module/theme/view/header/header.js.php
@@ -82,6 +82,7 @@ $("input, select").on("change", function() {
 			}
 			break;
 	}
+
 	// Ajout du css au DOM
 	$("#themePreview").remove();
 	$("<style>")
@@ -90,6 +91,15 @@ $("input, select").on("change", function() {
 		.text(css)
 		.appendTo("head");
 });
+
+$("#themeHeaderImage").on("change", function() {
+	if($("#themeHeaderImage").val()) {
+			$("#themeHeaderBackgroundColorWrapper").slideUp();			
+		} else {
+			$("#themeHeaderBackgroundColorWrapper").slideDown();
+		}
+});
+
 // Affiche / Cache les options de l'image du fond
 $("#themeHeaderImage").on("change", function() {
 	if($(this).val()) {