diff --git a/classes/feeds.php b/classes/feeds.php
index f7a6aea7b..07677a8cd 100755
--- a/classes/feeds.php
+++ b/classes/feeds.php
@@ -408,7 +408,7 @@ class Feeds extends Handler_Protected {
 				if (!$offset && $message) {
 					$reply['content'] = "<div class='whiteBox'>$message";
 
-					$reply['content'] .= "<p><span class=\"insensitive\">";
+					$reply['content'] .= "<p><span class=\"text-muted\">";
 
 					$sth = $this->pdo->prepare("SELECT " . SUBSTRING_FOR_DATE . "(MAX(last_updated), 1, 19) AS last_updated FROM ttrss_feeds
                         WHERE owner_uid = ?");
@@ -428,7 +428,7 @@ class Feeds extends Handler_Protected {
 
 					if ($num_errors > 0) {
 						$reply['content'] .= "<br/>";
-						$reply['content'] .= "<a class=\"insensitive\" href=\"#\" onclick=\"CommonDialogs.showFeedsWithErrors()\">" .
+						$reply['content'] .= "<a class=\"text-muted\" href=\"#\" onclick=\"CommonDialogs.showFeedsWithErrors()\">" .
 							__('Some feeds have update errors (click for details)') . "</a>";
 					}
 					$reply['content'] .= "</span></p></div>";
@@ -585,7 +585,7 @@ class Feeds extends Handler_Protected {
 
 		$reply['headlines']['content'] = "<div class='whiteBox'>".__('No feed selected.');
 
-		$reply['headlines']['content'] .= "<p><span class=\"insensitive\">";
+		$reply['headlines']['content'] .= "<p><span class=\"text-muted\">";
 
 		$sth = $this->pdo->prepare("SELECT ".SUBSTRING_FOR_DATE."(MAX(last_updated), 1, 19) AS last_updated FROM ttrss_feeds
 			WHERE owner_uid = ?");
@@ -605,7 +605,7 @@ class Feeds extends Handler_Protected {
 
 		if ($num_errors > 0) {
 			$reply['headlines']['content'] .= "<br/>";
-			$reply['headlines']['content'] .= "<a class=\"insensitive\" href=\"#\" onclick=\"CommonDialogs.showFeedsWithErrors()\">".
+			$reply['headlines']['content'] .= "<a class=\"text-muted\" href=\"#\" onclick=\"CommonDialogs.showFeedsWithErrors()\">".
 				__('Some feeds have update errors (click for details)')."</a>";
 		}
 		$reply['headlines']['content'] .= "</span></p>";
diff --git a/classes/handler/public.php b/classes/handler/public.php
index a8f72e21c..9c6a94c12 100755
--- a/classes/handler/public.php
+++ b/classes/handler/public.php
@@ -613,7 +613,7 @@ class Handler_Public extends Handler {
 					<fieldset>
 						<button dojoType='dijit.form.Button' class="alt-primary" type="submit"><?php echo __('Share') ?></button>
 						<button dojoType='dijit.form.Button' onclick="return window.close()"><?php echo __('Cancel') ?></button>
-						<span class="insensitive small"><?php echo __("Shared article will appear in the Published feed.") ?></span>
+						<span class="text-muted small"><?php echo __("Shared article will appear in the Published feed.") ?></span>
 					</fieldset>
 
 				</form>
diff --git a/classes/pref/feeds.php b/classes/pref/feeds.php
index f9ba853f8..b7d4c3890 100755
--- a/classes/pref/feeds.php
+++ b/classes/pref/feeds.php
@@ -1487,7 +1487,7 @@ class Pref_Feeds extends Handler_Protected {
 				"onclick=\"CommonDialogs.editFeed(".$line["id"].")\">".
 				htmlspecialchars($line["title"])."</a>";
 
-			print "</td><td class='insensitive' align='right'>";
+			print "</td><td class='text-muted' align='right'>";
 			print make_local_datetime($line['last_article'], false);
 			print "</td>";
 			print "</tr>";
@@ -1544,7 +1544,7 @@ class Pref_Feeds extends Handler_Protected {
 				"onclick=\"CommonDialogs.editFeed(".$line["id"].")\">".
 				htmlspecialchars($line["title"])."</a>: ";
 
-			print "<span class=\"insensitive\">";
+			print "<span class=\"text-muted\">";
 			print htmlspecialchars($line["last_error"]);
 			print "</span>";
 
diff --git a/classes/pref/filters.php b/classes/pref/filters.php
index f5a580e78..37a7236ee 100755
--- a/classes/pref/filters.php
+++ b/classes/pref/filters.php
@@ -148,7 +148,7 @@ class Pref_Filters extends Handler_Protected {
 
 				$tmp = "<li><span class='title'>" . $line["title"] . "</span><br/>" .
 					"<span class='feed'>" . $line['feed_title'] . "</span>, <span class='date'>" . mb_substr($line["date_entered"], 0, 16) . "</span>" .
-					"<div class='preview insensitive'>" . $content_preview . "</div>" .
+					"<div class='preview text-muted'>" . $content_preview . "</div>" .
 					"</li>";
 
 				array_push($rv, $tmp);
diff --git a/classes/pref/prefs.php b/classes/pref/prefs.php
index b611646a9..cb10e2322 100644
--- a/classes/pref/prefs.php
+++ b/classes/pref/prefs.php
@@ -685,7 +685,7 @@ class Pref_Prefs extends Handler_Protected {
 					}
 
 					if ($item['help_text'])
-						print "<div class='help-text insensitive'><label for='CB_$pref_name'>".$item['help_text']."</label></div>";
+						print "<div class='help-text text-muted'><label for='CB_$pref_name'>".$item['help_text']."</label></div>";
 
 					print "</fieldset>";
 				}
@@ -785,7 +785,7 @@ class Pref_Prefs extends Handler_Protected {
 
 				print "<fieldset class='prefs plugin'>
 					<label>$name:</label>
-					<label class='checkbox description insensitive' id='PLABEL-$name'>
+					<label class='checkbox description text-muted' id='PLABEL-$name'>
 						<input disabled='1'
 							dojoType='dijit.form.CheckBox' $checked type='checkbox'>
 						".htmlspecialchars($about[1]). "</label>";
@@ -824,7 +824,7 @@ class Pref_Prefs extends Handler_Protected {
 
 				print "<fieldset class='prefs plugin'>
 					<label>$name:</label>
-					<label class='checkbox description insensitive' id='PLABEL-$name'>
+					<label class='checkbox description text-muted' id='PLABEL-$name'>
 						<input name='plugins[]' value='$name' dojoType='dijit.form.CheckBox' $checked $disabled type='checkbox'>
 						".htmlspecialchars($about[1])."</label>";
 
diff --git a/css/default.css b/css/default.css
index 5d2ed7caf..2121f26dc 100644
--- a/css/default.css
+++ b/css/default.css
@@ -1013,8 +1013,8 @@ body.ttrss_utility hr {
   border: 0px solid #ccc;
   border-bottom-width: 1px;
 }
-body.ttrss_main .insensitive,
-body.ttrss_utility .insensitive {
+body.ttrss_main .text-muted,
+body.ttrss_utility .text-muted {
   color: #555;
 }
 body.ttrss_main .small,
diff --git a/css/tt-rss.less b/css/tt-rss.less
index f497c4af5..108c493b9 100755
--- a/css/tt-rss.less
+++ b/css/tt-rss.less
@@ -1191,7 +1191,7 @@ body.ttrss_main, body.ttrss_utility {
 		border-bottom-width: 1px;
 	}
 
-	.insensitive {
+	.text-muted {
 		color : @default-text;
 	}
 
diff --git a/js/PrefFeedTree.js b/js/PrefFeedTree.js
index c2c7751bf..3a5e33b2b 100644
--- a/js/PrefFeedTree.js
+++ b/js/PrefFeedTree.js
@@ -275,9 +275,9 @@ define(["dojo/_base/declare", "dojo/dom-construct", "lib/CheckBoxTree"], functio
 
 						if ($(label))
 							if (checkbox.checked)
-								$(label).removeClassName('insensitive');
+								$(label).removeClassName('text-muted');
 							else
-								$(label).addClassName('insensitive');
+								$(label).addClassName('text-muted');
 
 					},
 					execute: function () {
diff --git a/plugins/af_psql_trgm/init.php b/plugins/af_psql_trgm/init.php
index 697fbb9c6..dbc99cfe4 100644
--- a/plugins/af_psql_trgm/init.php
+++ b/plugins/af_psql_trgm/init.php
@@ -98,7 +98,7 @@ class Af_Psql_Trgm extends Plugin {
 
 				print "</div>";
 
-				print "<div style='text-align : right' class='insensitive'>" . smart_date_time(strtotime($line["updated"])) . "</div>";
+				print "<div style='text-align : right' class='text-muted'>" . smart_date_time(strtotime($line["updated"])) . "</div>";
 
 				print "</li>";
 			}
diff --git a/prefs.php b/prefs.php
index 8a7b788d7..38e201fec 100644
--- a/prefs.php
+++ b/prefs.php
@@ -153,13 +153,13 @@
         ?>
         </div>
     <div id="footer" dojoType="dijit.layout.ContentPane" region="bottom">
-        <a class="insensitive" target="_blank" href="http://tt-rss.org/">
+        <a class="text-muted" target="_blank" href="http://tt-rss.org/">
         Tiny Tiny RSS</a>
         <?php if (!defined('HIDE_VERSION')) { ?>
              v<?php echo VERSION ?>
         <?php } ?>
         &copy; 2005-<?php echo date('Y') ?>
-        <a class="insensitive" target="_blank"
+        <a class="text-muted" target="_blank"
         href="http://fakecake.org/">Andrew Dolgov</a>
     </div> <!-- footer -->
 </div>
diff --git a/themes/night.css b/themes/night.css
index 81ff1669c..a8b722157 100644
--- a/themes/night.css
+++ b/themes/night.css
@@ -1014,8 +1014,8 @@ body.ttrss_utility hr {
   border: 0px solid #ccc;
   border-bottom-width: 1px;
 }
-body.ttrss_main .insensitive,
-body.ttrss_utility .insensitive {
+body.ttrss_main .text-muted,
+body.ttrss_utility .text-muted {
   color: #ccc;
 }
 body.ttrss_main .small,
@@ -1969,7 +1969,7 @@ body.flat.ttrss_main .dijitCheckBox:not(.dijitChecked)::before {
   color: #999999;
   background: #222;
 }
-body.flat.ttrss_main .insensitive {
+body.flat.ttrss_main .text-muted {
   color: #999999;
 }
 body.flat.ttrss_main .dijitAccordionInnerContainerSelected .dijitAccordionTitle {
diff --git a/themes/night_base.less b/themes/night_base.less
index 9e664fcd9..8e6755b64 100644
--- a/themes/night_base.less
+++ b/themes/night_base.less
@@ -12,7 +12,7 @@
 
 @default-text: #ccc;
 
-@fg-insensitive: darken(@default-text, 20%);
+@fg-text-muted: darken(@default-text, 20%);
 @fg-light : lighten(@default-text, 10%);
 
 body.flat.ttrss_main.ttrss_prefs {
@@ -26,7 +26,7 @@ body.flat.ttrss_main.ttrss_prefs {
 
 	td.filename,
 	div.prefHelp {
-		color : @fg-insensitive;
+		color : @fg-text-muted;
 	}
 }
 
@@ -157,7 +157,7 @@ body.flat.ttrss_main {
 			}
 
 			.author {
-				color : @fg-insensitive;
+				color : @fg-text-muted;
 			}
 
 			.updated, .content {
@@ -198,12 +198,12 @@ body.flat.ttrss_main {
 	}
 
 	.dijitCheckBox:not(.dijitChecked)::before {
-		color : @fg-insensitive;
+		color : @fg-text-muted;
 		background: @color-panel-bg;
 	}
 
-	.insensitive {
-		color : @fg-insensitive;
+	.text-muted {
+		color : @fg-text-muted;
 	}
 
 	.dijitAccordionInnerContainerSelected .dijitAccordionTitle {
diff --git a/themes/night_blue.css b/themes/night_blue.css
index 4c8b679e9..f679b3176 100644
--- a/themes/night_blue.css
+++ b/themes/night_blue.css
@@ -1014,8 +1014,8 @@ body.ttrss_utility hr {
   border: 0px solid #ccc;
   border-bottom-width: 1px;
 }
-body.ttrss_main .insensitive,
-body.ttrss_utility .insensitive {
+body.ttrss_main .text-muted,
+body.ttrss_utility .text-muted {
   color: #ccc;
 }
 body.ttrss_main .small,
@@ -1969,7 +1969,7 @@ body.flat.ttrss_main .dijitCheckBox:not(.dijitChecked)::before {
   color: #999999;
   background: #222;
 }
-body.flat.ttrss_main .insensitive {
+body.flat.ttrss_main .text-muted {
   color: #999999;
 }
 body.flat.ttrss_main .dijitAccordionInnerContainerSelected .dijitAccordionTitle {