--- a/devtools/client/netmonitor/src/assets/styles/RequestList.css
+++ b/devtools/client/netmonitor/src/assets/styles/RequestList.css
@@ -557,17 +557,17 @@
   color: var(--theme-selection-color);
 }
 
 .request-list-item:not(.selected).odd {
   background-color: var(--table-zebra-background);
 }
 
 .request-list-item:not(.selected):hover {
-  background-color: var(--theme-selection-background-hover);
+  background-color: var(--table-selection-background-hover);
 }
 
 .request-list-item:not(.selected).fromCache > .requests-list-column:not(.requests-list-waterfall) {
   opacity: 0.7;
 }
 
 /* Responsive web design support */
 

--- a/devtools/client/netmonitor/src/assets/styles/variables.css
+++ b/devtools/client/netmonitor/src/assets/styles/variables.css
@@ -1,32 +1,34 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 :root.theme-dark {
   --table-text-color: var(--grey-40);
   --table-splitter-color: rgba(255,255,255,0.15);
   --table-zebra-background: rgba(255,255,255,0.05);
+  --table-selection-background-hover: rgba(53, 59, 72, 1);
 
   --timing-blocked-color: rgba(235, 83, 104, 0.8);
   --timing-dns-color: rgba(223, 128, 255, 0.8); /* pink */
   --timing-ssl-color: rgba(217, 102, 41, 0.8); /* orange */
   --timing-connect-color: rgba(217, 102, 41, 0.8); /* orange */
   --timing-send-color: rgba(70, 175, 227, 0.8); /* light blue */
   --timing-wait-color: rgba(94, 136, 176, 0.8); /* blue grey */
   --timing-receive-color: rgba(112, 191, 83, 0.8); /* green */
 }
 
 :root.theme-light {
   --theme-body-color: var(--grey-70);
 
   --table-text-color: var(--grey-70);
   --table-splitter-color: rgba(0,0,0,0.15);
-  --table-zebra-background: rgba(0,0,0,0.05);
+  --table-zebra-background: rgba(247, 247, 247, 0.8);
+  --table-selection-background-hover: rgba(209, 232, 255, 0.8);
 
   --timing-blocked-color: rgba(235, 83, 104, 0.8);
   --timing-dns-color: rgba(223, 128, 255, 0.8); /* pink */
   --timing-ssl-color: rgba(217, 102, 41, 0.8); /* orange */
   --timing-connect-color: rgba(217, 102, 41, 0.8); /* orange */
   --timing-send-color: rgba(0, 136, 204, 0.8); /* blue */
   --timing-wait-color: rgba(95, 136, 176, 0.8); /* blue grey */
   --timing-receive-color: rgba(44, 187, 15, 0.8); /* green */