diff --git a/theme-arc-blue.css b/theme-arc-blue.css
index 324dedb..a447fd6 100644
--- a/theme-arc-blue.css
+++ b/theme-arc-blue.css
@@ -972,19 +972,22 @@
   }
   .markdown:not(code) h1 {
       color: #d5d5d5;
-  } 
+  }
   .markdown:not(code) h2 {
       color: #d5d5d5;
-  } 
+  }
   .markdown:not(code) h3 {
       color: #d5d5d5;
-  } 
+  }
   .markdown:not(code) h4 {
       color: #d5d5d5;
-  } 
+  }
   .markdown:not(code) h5 {
       color: #d5d5d5;
-  } 
+  }
   .markdown:not(code) h6 {
       color: #d5d5d5;
   }
+   .heatmap-color-0{
+      background-color: #1a1a1a;
+  }