diff --git a/extensions/theme-abyss/themes/Abyss.tmTheme b/extensions/theme-abyss/themes/Abyss.tmTheme
index 8bcfd908052d6..9008319e1531e 100644
--- a/extensions/theme-abyss/themes/Abyss.tmTheme
+++ b/extensions/theme-abyss/themes/Abyss.tmTheme
@@ -21,6 +21,8 @@
 				<string>#082050</string>
 				<key>selection</key>
 				<string>#770811</string>
+				<key>guide</key>
+				<string>#002952</string>
 			</dict>
 		</dict>
 		<dict>
diff --git a/extensions/theme-monokai/themes/Monokai.tmTheme b/extensions/theme-monokai/themes/Monokai.tmTheme
index 0f455f8e8a220..a25d90b2a4506 100644
--- a/extensions/theme-monokai/themes/Monokai.tmTheme
+++ b/extensions/theme-monokai/themes/Monokai.tmTheme
@@ -29,6 +29,8 @@
 				<string>#222218</string>
 				<key>activeGuide</key>
 				<string>#9D550FB0</string>
+				<key>guide</key>
+				<string>#48473E</string>
 
 				<key>bracketsForeground</key>
 				<string>#F8F8F2A5</string>
diff --git a/src/vs/editor/browser/viewParts/indentGuides/indentGuides.css b/src/vs/editor/browser/viewParts/indentGuides/indentGuides.css
index ccbe390c6da16..a4793a6604450 100644
--- a/src/vs/editor/browser/viewParts/indentGuides/indentGuides.css
+++ b/src/vs/editor/browser/viewParts/indentGuides/indentGuides.css
@@ -13,7 +13,10 @@
 	width: 1px;
 }
 
-.monaco-editor.vs-dark .lines-content .cigr,
+.monaco-editor.vs-dark .lines-content .cigr {
+	background: #404040;
+}
+
 .monaco-editor.hc-black .lines-content .cigr {
-	background: #353535;
+	background: #ffffff;
 }