diff --git a/static/css/theme-neon.css b/static/css/theme-neon.css
index 46d7f678d9..0bd47fee22 100644
--- a/static/css/theme-neon.css
+++ b/static/css/theme-neon.css
@@ -56,7 +56,7 @@
 
     /* base styling for boxes */
     --BOX-CAPTION-color: rgba( 240, 240, 240, 1 ); /* text color of colored box titles */
-    --BOX-BG-color: rgba( 20, 20, 20, 1 ); /* background color of colored boxes */
+    --BOX-BG-color: rgba( 8, 8, 8, 1 ); /* background color of colored boxes */
     --BOX-TEXT-color: initial; /* text color of colored box content */
 
     /* optional base colors for colored boxes as in attachments, badges, buttons and notice shortcode */
@@ -64,7 +64,7 @@
     --BOX-BLUE-TEXT-color: var( --BOX-BLUE-color ); /* text color of blue boxes */
     --BOX-GREEN-color: rgba( 42, 178, 24, 1 ); /* background color of green boxes */
     --BOX-GREEN-TEXT-color: var( --BOX-GREEN-color ); /* text color of green boxes */
-    --BOX-GREY-color: rgba( 160, 160, 160, 1 ); /* background color of grey boxes */
+    --BOX-GREY-color: rgba( 128, 128, 128, 1 ); /* background color of grey boxes */
     --BOX-GREY-TEXT-color: var( --BOX-GREY-color ); /* text color of grey boxes */
     --BOX-ORANGE-color: rgba( 237, 153, 9, 1 ); /* background color of orange boxes */
     --BOX-ORANGE-TEXT-color: var( --BOX-ORANGE-color ); /* text color of orange boxes */