diff --git a/static/css/theme-relearn-dark.css b/static/css/theme-relearn-dark.css
index d33027fbc6..440d9c70ea 100644
--- a/static/css/theme-relearn-dark.css
+++ b/static/css/theme-relearn-dark.css
@@ -19,7 +19,7 @@
     --CODE-BLOCK-BORDER-color: #2b2b2b; /* color of block code border */
 
     --CODE-INLINE-color: #82e550; /* color for inline code text */
-    --CODE-INLINE-BG-color: #282a36; /* color for inline code background */
+    --CODE-INLINE-BG-color: #2d2d2d; /* color for inline code background */
     --CODE-INLINE-BORDER-color: #464646; /* color of inline code border */
 
     --MENU-HOME-LINK-color: #323232; /* Color of the home button text */
diff --git a/static/css/theme-relearn-light.css b/static/css/theme-relearn-light.css
index 1d8ba07899..1aa0096b4c 100644
--- a/static/css/theme-relearn-light.css
+++ b/static/css/theme-relearn-light.css
@@ -7,7 +7,7 @@
 
 :root {
     --MAIN-TEXT-color: #101010; /* Color of text by default */
-    --MAIN-TITLES-TEXT-color: #444753; /* Color of titles h2-h3-h4-h5-h6 */
+    --MAIN-TITLES-TEXT-color: #4a4a4a; /* Color of titles h2-h3-h4-h5-h6 */
     --MAIN-LINK-color: #486ac9; /* Color of links */
     --MAIN-LINK-HOVER-color: #134fbf; /* Color of hovered links */
     --MAIN-ANCHOR-color: #486ac9; /* color of anchors on titles */
@@ -32,8 +32,8 @@
     --MENU-SEARCH-BG-color: #323232; /* Search field background color (by default borders + icons) */
     --MENU-SEARCH-BOX-color: #e0e0e0; /* Override search field border color */
 
-    --MENU-SECTIONS-ACTIVE-BG-color: #202028; /* Background color of the active section and its children */
-    --MENU-SECTIONS-BG-color: #282830; /* Background color of other sections */
+    --MENU-SECTIONS-ACTIVE-BG-color: rgba( 0, 0, 0, .166 ); /* Background color of the active section and its children */
+    --MENU-SECTIONS-BG-color: #282828; /* Background color of other sections */
     --MENU-SECTIONS-LINK-color: #bababa; /* Color of links in menu */
     --MENU-SECTIONS-LINK-HOVER-color: #ffffff;  /* Color of links in menu, when hovered */
     --MENU-SECTION-ACTIVE-CATEGORY-color: #444444; /* Color of active category text */
diff --git a/static/css/theme.css b/static/css/theme.css
index 7d4a135dec..497e966561 100644
--- a/static/css/theme.css
+++ b/static/css/theme.css
@@ -87,7 +87,7 @@ th {
 }
 
 #sidebar {
-    background: #282830; /* var(--MENU-SECTIONS-BG-color) */
+    background: #282828; /* var(--MENU-SECTIONS-BG-color) */
     bottom: 0;
     display: flex;
     flex-direction: column;
@@ -224,7 +224,7 @@ th {
 }
 
 #sidebar ul.topics > li.parent {
-    background-color: #202028; /* var(--MENU-SECTIONS-ACTIVE-BG-color) */
+    background-color: rgba( 0, 0, 0, .166 ); /* var(--MENU-SECTIONS-ACTIVE-BG-color) */
     margin-left: -1rem;
     margin-right: -1rem;
     padding-left: 1rem;
@@ -421,7 +421,7 @@ h1 {
 }
 
 h2, h3, h4, h5, h6 {
-    color: #444753; /* var(--MAIN-TITLES-TEXT-color) */
+    color: #4a4a4a; /* var(--MAIN-TITLES-TEXT-color) */
     font-family: "Work Sans", "Helvetica", "Tahoma", "Geneva", "Arial", sans-serif;
     letter-spacing: -1px;
     text-rendering: optimizeLegibility;
@@ -585,7 +585,7 @@ div.box.transparent {
 }
 
 div.box.transparent > .box-label {
-    color: #444753; /* var(--MAIN-TITLES-TEXT-color) */
+    color: #4a4a4a; /* var(--MAIN-TITLES-TEXT-color) */
 }
 
 div.box.transparent > .box-content {
diff --git a/static/css/variant.css b/static/css/variant.css
index f0ecf3ee08..47c954bbc7 100644
--- a/static/css/variant.css
+++ b/static/css/variant.css
@@ -32,7 +32,8 @@
     --INTERNAL-MENU-SEARCH-color: var(--MENU-SEARCH-color, #e0e0e0);
     --INTERNAL-MENU-SEARCH-BG-color: var(--MENU-SEARCH-BG-color, #323232);
     --INTERNAL-MENU-SEARCH-BOX-color: var(--MENU-SEARCH-BOX-color, var(--INTERNAL-MENU-SEARCH-BG-color));
-    --INTERNAL-MENU-SECTIONS-ACTIVE-BG-color: var(--MENU-SECTIONS-ACTIVE-BG-color, #202028);
+
+    --INTERNAL-MENU-SECTIONS-ACTIVE-BG-color: var(--MENU-SECTIONS-ACTIVE-BG-color, rgba( 0, 0, 0, .166 ));
     --INTERNAL-MENU-SECTIONS-BG-color: var(--MENU-SECTIONS-BG-color, #282830);
     --INTERNAL-MENU-SECTIONS-LINK-color: var(--MENU-SECTIONS-LINK-color, #bababa);
     --INTERNAL-MENU-SECTIONS-LINK-HOVER-color: var(--MENU-SECTIONS-LINK-HOVER-color, var(--INTERNAL-MENU-SECTIONS-LINK-color));