diff --git a/web_src/less/themes/theme-arc-green.less b/web_src/less/themes/theme-arc-green.less
index 9aa077ab72..ffc6872cb3 100644
--- a/web_src/less/themes/theme-arc-green.less
+++ b/web_src/less/themes/theme-arc-green.less
@@ -1586,7 +1586,7 @@ body .xdsoft_datetimepicker {
 
 .markdown:not(code) code,
 .markdown:not(code) tt {
-    background-color: rgba(0, 0, 0, .12);
+    background-color: #2a2e3a;
 }
 
 footer .container .links > * {