diff --git a/_config.yml b/_config.yml
index 69f63040f2f..dbbc7efd853 100644
--- a/_config.yml
+++ b/_config.yml
@@ -16,7 +16,7 @@ timezone: Asia/Shanghai
 
 title: invhun # the main title
 
-tagline: 논문, 코드리뷰 등 \n학습 기록 블로그입니다 # it will display as the sub-title
+tagline: 논문, 코드리뷰 등 /n학습 기록 블로그입니다 # it will display as the sub-title
 
 description: >- # used by seo meta and the atom feed
   Blog
diff --git a/_sass/addon/commons.scss b/_sass/addon/commons.scss
index ca93ccb986b..b08a9334a32 100644
--- a/_sass/addon/commons.scss
+++ b/_sass/addon/commons.scss
@@ -686,11 +686,11 @@ $btn-mb: 0.5rem;
   position: fixed;
   top: 0;
   left: 0;
-  height: 200%;
+  height: 100%;
   overflow-y: auto;
   width: $sidebar-width;
   z-index: 99;
-  background: url('/assets/img/background/background_paris_s.jpg');
+  background: var(--sidebar-bg);
   border-right: 1px solid var(--sidebar-border-color);
 
   /* Hide scrollbar for Chrome, Safari and Opera */
@@ -751,13 +751,13 @@ $btn-mb: 0.5rem;
       @extend %clickable-transition;
       @extend %sidebar-link-hover;
 
-      color: rgba(254, 254, 254, 0.99);
+      color: var(--site-title-color);
     }
   }
 
   .site-subtitle {
     font-size: 95%;
-    color: rgba(254, 254, 254, 0.99);
+    color: var(--site-subtitle-color);
     margin-top: 0.25rem;
     word-spacing: 1px;
     -webkit-user-select: none;
@@ -1535,4 +1535,4 @@ search {
       }
     }
   }
-} /* min-width: 1650px */
+} /* min-width: 1650px */
\ No newline at end of file