--- a/devtools/client/netmonitor/src/assets/styles/netmonitor.css
+++ b/devtools/client/netmonitor/src/assets/styles/netmonitor.css
@@ -878,17 +878,18 @@ body,
   border-bottom: 1px solid var(--theme-splitter-color);
 }
 
 .tree-container .treeTable .tree-section > * {
   vertical-align: middle;
 }
 
 .tree-container .treeTable .treeRow.tree-section > .treeLabelCell > .treeLabel,
-.tree-container .treeTable .treeRow.tree-section > .treeLabelCell > .treeLabel:hover {
+.tree-container .treeTable .treeRow.tree-section > .treeLabelCell > .treeLabel:hover,
+.tree-container .treeTable .treeRow.tree-section > .treeValueCell:not(:hover) * {
   color: var(--theme-body-color-alt);
 }
 
 .tree-container .treeTable .treeValueCell {
   /* FIXME: Make value cell can be reduced to shorter width */
   max-width: 0;
   padding-inline-end: 5px;
 }