--- a/browser/themes/shared/devtools/netmonitor.inc.css
+++ b/browser/themes/shared/devtools/netmonitor.inc.css
@@ -521,21 +521,28 @@ box.requests-menu-status {
 #headers-summary-resend {
   margin-top: -10px;
   -moz-margin-end: 6px;
 }
 
 /* Response tabpanel */
 
 #response-content-info-header {
-  background: linear-gradient(hsl(0,60%,40%), hsl(0,60%,30%)) repeat-x top left;
-  box-shadow: inset 0 1px 0 hsla(210,40%,80%,.15),
-              inset 0 -1px 0 hsla(210,40%,80%,.05);
   margin: 0;
-  padding: 5px 8px;
+  padding: 3px 8px;
+}
+
+.theme-dark  #response-content-info-header {
+  background: url(background-noise-toolbar.png), #eb5368; /* Red highlight */
+  color: #f5f7fa; /* Light foreground text */
+}
+
+.theme-light  #response-content-info-header {
+  background: url(background-noise-toolbar.png), #ed2655; /* Red highlight */
+  color: #f5f7fa; /* Light foreground text */
 }
 
 #response-content-image-box {
   padding-top: 10px;
   padding-bottom: 10px;
 }
 
 #response-content-image {