diff --git a/src/css/theme/source/inrae.scss b/src/css/theme/source/inrae.scss
index 3ceb443023ecdc20a0cc436a0701084b1fb365d0..acc5b50cef4a5ac309dd771ec29eb7fbe69f1a4b 100644
--- a/src/css/theme/source/inrae.scss
+++ b/src/css/theme/source/inrae.scss
@@ -43,6 +43,7 @@ $heading4Size: 1em;
 .reveal {
   section.slide {
     text-align: left;
+    background: white;
   }
 
   * > h1.title,