diff --git a/core/core-frontend/src/views/chart/components/editor/editor-style/components/TooltipSelector.vue b/core/core-frontend/src/views/chart/components/editor/editor-style/components/TooltipSelector.vue
index e9ac60c361..5532a2b878 100644
--- a/core/core-frontend/src/views/chart/components/editor/editor-style/components/TooltipSelector.vue
+++ b/core/core-frontend/src/views/chart/components/editor/editor-style/components/TooltipSelector.vue
@@ -487,6 +487,7 @@ onMounted(() => {
         @change="changeTooltipAttr('backgroundColor')"
         is-custom
         :trigger-width="108"
+        show-alpha
       />
     </el-form-item>
     <el-space>