diff --git a/packages/abc/theme-dark.less b/packages/abc/theme-dark.less
index 07cae452a0..4d404f4ff1 100644
--- a/packages/abc/theme-dark.less
+++ b/packages/abc/theme-dark.less
@@ -40,5 +40,5 @@
 // onboarding
 // --
 @onboarding-mask-opacity: 0.5;
-@onboarding-light-background-color: @component-background;
+@onboarding-light-background-color: rgba(0, 0, 0, 0.1);
 @onboarding-light-ant-color: @component-background;