diff --git a/core/modules/system/css/system.theme.css b/core/modules/system/css/system.theme.css
index 2cc44e776450074d89ccab8eca27d4e298c2ca81..48fc3dd78a83afc8e91729136713d77b5e00ad55 100644
--- a/core/modules/system/css/system.theme.css
+++ b/core/modules/system/css/system.theme.css
@@ -541,12 +541,10 @@ ul.tabs {
   box-shadow: 8px 0 0 #77b259;
   margin-left: 0;
 }
-.messages--status,
-.ok {
+.messages--status {
   color: #325e1c;
 }
-.messages--status,
-table tr.ok {
+.messages--status {
   background-color: #f3faef;
 }
 
@@ -564,7 +562,8 @@ table tr.ok {
   color: #734c00;
 }
 .messages--warning,
-table tr.warning {
+table tr.warning,
+table tr.warning:hover {
   background-color: #fdf8ed;
 }
 
@@ -582,7 +581,8 @@ table tr.warning {
   color: #a51b00;
 }
 .messages--error,
-table tr.error {
+table tr.error,
+table tr.error:hover {
   background-color: #fcf4f2;
 }
 .messages--error p.error {
diff --git a/core/themes/seven/css/components/tables.css b/core/themes/seven/css/components/tables.css
index 524c83be572d02c525bb9dd4a97e9e00ffc600ac..6fde17cb8986ef7618d1b73b80a6120422ac4800 100644
--- a/core/themes/seven/css/components/tables.css
+++ b/core/themes/seven/css/components/tables.css
@@ -118,8 +118,6 @@ th.select-all {
  */
 table.system-status-report tr {
   border-top: 1px solid #ccc;
-  border-left: 1px solid #bebfb9;
-  border-right: 1px solid #bebfb9;
   border-bottom: inherit;
 }
 table.system-status-report tr:first-child {
@@ -128,18 +126,11 @@ table.system-status-report tr:first-child {
 table.system-status-report tr:last-child {
   border-bottom: 1px solid #bebfb9;
 }
-
-table.system-status-report tr.ok {
-  color: #255b1e;
-  background-color: #e5ffe2;
-}
-table.system-status-report tr.warning {
-  color: #840;
-  background-color: #fffce5;
+table.system-status-report td {
+  padding: 12px;
 }
-table.system-status-report tr.error {
-  color: #8c2e0b;
-  background-color: #fef5f1;
+table.system-status-report td:nth-child(-n+2) {
+ background-color: transparent;
 }
 
 /**