diff --git a/themes/yilia/source-src/css/article-main.scss b/themes/yilia/source-src/css/article-main.scss
index 98b442e..49e0463 100644
--- a/themes/yilia/source-src/css/article-main.scss
+++ b/themes/yilia/source-src/css/article-main.scss
@@ -12,7 +12,7 @@
   border-width: 1px;
   border-style: solid;
   border-color: #fff #ddd;
-  background: #{$colorBg}cc;
+  background: adjust-color($colorBg, $alpha: -0.2);
   @extend %trans;
   img{
     max-width: 100%;
diff --git a/themes/yilia/source-src/css/night.scss b/themes/yilia/source-src/css/night.scss
index 3784841..43f6458 100644
--- a/themes/yilia/source-src/css/night.scss
+++ b/themes/yilia/source-src/css/night.scss
@@ -46,7 +46,7 @@ body.night {
   }
   // 文章区域
   .article{
-    background: #{$articleBg_night}cc;
+    background: adjust-color($articleBg_night, $alpha: -0.2);
     border-color: $borderColor_night;
     color: $textColor_night;
     .article-title { // 主标题