diff --git a/public/reveal-hugo/themes/sunblind.css b/public/reveal-hugo/themes/sunblind.css
index 2a48fbd..a1d9dbe 100644
--- a/public/reveal-hugo/themes/sunblind.css
+++ b/public/reveal-hugo/themes/sunblind.css
@@ -39,7 +39,7 @@ section.has-light-background, section.has-light-background h1, section.has-light
 .line {
   content: '';
   position: fixed;
-  background: #f6f195;
+  background: #000;
   z-index: 105; }
   .line.top {
     left: 0;
diff --git a/static/reveal-hugo/themes/sunblind.css b/static/reveal-hugo/themes/sunblind.css
index 2a48fbd..a1d9dbe 100644
--- a/static/reveal-hugo/themes/sunblind.css
+++ b/static/reveal-hugo/themes/sunblind.css
@@ -39,7 +39,7 @@ section.has-light-background, section.has-light-background h1, section.has-light
 .line {
   content: '';
   position: fixed;
-  background: #f6f195;
+  background: #000;
   z-index: 105; }
   .line.top {
     left: 0;