diff --git a/sql/structure.sql b/sql/structure.sql
index 6c30eec3e40f9026928b454fe613d830a4cebfb4..993212814d63de1bc729d771053db4a29e62a3bb 100755
--- a/sql/structure.sql
+++ b/sql/structure.sql
@@ -80,7 +80,7 @@ CREATE TABLE users
   picture text,
   enabled boolean DEFAULT TRUE,
   mode character varying(50) NOT NULL,
-  preferences json NOT NULL DEFAULT '{"writingMode" : "direct", "writingSize" : 1, "writingColor" : "#FFFFFF"}',
+  preferences json NOT NULL DEFAULT '{"writingMode" : "direct", "writingSize" : 1, "writingColor" : "#000000"}',
   cookie_key character varying(255) DEFAULT NULL::character varying,
   cookie_date timestamp without time zone,
   password_modification_date timestamp without time zone DEFAULT CURRENT_TIMESTAMP,
diff --git a/test/unitTests/app/user/UserControllerTest.php b/test/unitTests/app/user/UserControllerTest.php
index 0c24979bd60a9d1ab77f0b5c4a2a775c68e95a9a..3d58b060465c0c167f297f179f9ed5d055b70766 100755
--- a/test/unitTests/app/user/UserControllerTest.php
+++ b/test/unitTests/app/user/UserControllerTest.php
@@ -197,7 +197,7 @@ class UserControllerTest extends TestCase
             'preferences'   => [
                 'writingMode'   => 'direct',
                 'writingSize'   => 1,
-                'writingColor'  => '#FFFFFF',
+                'writingColor'  => '#000000',
             ]
         ];
 
@@ -215,7 +215,7 @@ class UserControllerTest extends TestCase
         $this->assertSame('JANE', $responseBody->user->lastname);
         $this->assertSame('direct', $responseBody->user->preferences->writingMode);
         $this->assertSame(1, $responseBody->user->preferences->writingSize);
-        $this->assertSame('#FFFFFF', $responseBody->user->preferences->writingColor);
+        $this->assertSame('#000000', $responseBody->user->preferences->writingColor);
     }
 
     public function testCreateSignature()