diff --git a/docs/en-US/component/popover.md b/docs/en-US/component/popover.md
index c148b36794..fa88b7221c 100644
--- a/docs/en-US/component/popover.md
+++ b/docs/en-US/component/popover.md
@@ -68,7 +68,7 @@ popover/directive-usage
 | ------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | --------------- | --------------------------------------------------------------------------------------------------------- | ------------------------------------------------------- |
 | trigger                   | how the popover is triggered                                                                                                                                             | string          | click/focus/hover/contextmenu                                                                             | click                                                   |
 | title                     | popover title                                                                                                                                                            | string          | —                                                                                                         | —                                                       |
-| effect                    | Tooltip theme, built-in theme: `dark` / `light`                                                                                                                          | string          | string                                                                                                    | dark                                                    |
+| effect                    | Tooltip theme, built-in theme: `dark` / `light`                                                                                                                          | string          | string                                                                                                    | light                                                   |
 | content                   | popover content, can be replaced with a default `slot`                                                                                                                   | string          | —                                                                                                         | —                                                       |
 | width                     | popover width                                                                                                                                                            | string / number | —                                                                                                         | Min width 150px                                         |
 | placement                 | popover placement                                                                                                                                                        | string          | top/top-start/top-end/bottom/bottom-start/bottom-end/left/left-start/left-end/right/right-start/right-end | bottom                                                  |
diff --git a/packages/theme-chalk/src/popover.scss b/packages/theme-chalk/src/popover.scss
index 178c0cfad9..b3dc0b53ff 100644
--- a/packages/theme-chalk/src/popover.scss
+++ b/packages/theme-chalk/src/popover.scss
@@ -38,6 +38,13 @@
       }
     }
 
+    @include when(dark) {
+      @include set-css-var-value(
+        'popover-title-text-color',
+        var(#{getCssVarName('bg-color')})
+      );
+    }
+
     &:focus:active,
     &:focus {
       outline-width: 0;