diff --git a/src/css/core/utils/common.css b/src/css/core/utils/common.css
index 5b0acfd7c8..46ba4486c7 100644
--- a/src/css/core/utils/common.css
+++ b/src/css/core/utils/common.css
@@ -395,8 +395,8 @@ textarea {
   filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#80232e40,endColorstr=#80232e40);
 }
 .bi-theme-dark .bi-z-index-mask {
-  background-color: rgba(25, 27, 43, 0.8);
-  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#cc191b2b,endColorstr=#cc191b2b);
+  background-color: rgba(96, 100, 121, 0.5);
+  filter: progid:DXImageTransform.Microsoft.gradient(startColorstr=#80606479,endColorstr=#80606479);
 }
 .bi-list-item:hover,
 .bi-list-item.hover {
diff --git a/src/less/core/utils/common.less b/src/less/core/utils/common.less
index df696e3abf..89832f3338 100644
--- a/src/less/core/utils/common.less
+++ b/src/less/core/utils/common.less
@@ -500,7 +500,7 @@ textarea {
     //& .bi-textarea {
     //  color: @color-bi-background-default;
     //}
-    .background-color(@background-color-normal-theme-dark, 80%);
+    .background-color(@color-bi-background-black-theme-dark, 50%);
   }
 }
 
diff --git a/src/less/lib/colors.less b/src/less/lib/colors.less
index a15749b035..8dc1ec5a23 100644
--- a/src/less/lib/colors.less
+++ b/src/less/lib/colors.less
@@ -46,6 +46,8 @@
 @color-bi-background-default-theme-dark: @background-color-default-theme-dark;
 //黑色背景
 @color-bi-background-black: @background-color-black;
+//深色系黑色背景
+@color-bi-background-black-theme-dark: @background-color-black-theme-dark;
 //浅黑色背景
 @color-bi-background-light-black: @background-color-light-black;
 //深色系浅黑色背景
diff --git a/src/less/lib/constant.less b/src/less/lib/constant.less
index c13039f99e..81835ff8ba 100644
--- a/src/less/lib/constant.less
+++ b/src/less/lib/constant.less
@@ -48,6 +48,7 @@
 
 //background color
 @background-color-black: #232E40;
+@background-color-black-theme-dark: #606479;
 @background-color-light-black: #3d4d66;
 @background-color-light-black-theme-dark: #d6e0dc;
 @background-color-default: #ffffff;