From bc4a76ea1f4f87565ebf1b4666a5f9e0e22d84b7 Mon Sep 17 00:00:00 2001
From: moririn2528 <strangenoise1@gmail.com>
Date: Tue, 12 Sep 2023 14:48:48 +0900
Subject: [PATCH] fix ui by review

---
 optuna_dashboard/ts/components/PreferenceHistory.tsx | 1 +
 1 file changed, 1 insertion(+)

diff --git a/optuna_dashboard/ts/components/PreferenceHistory.tsx b/optuna_dashboard/ts/components/PreferenceHistory.tsx
index 81f106bd..9e19bf07 100644
--- a/optuna_dashboard/ts/components/PreferenceHistory.tsx
+++ b/optuna_dashboard/ts/components/PreferenceHistory.tsx
@@ -204,6 +204,7 @@ const ChoiceTrials: FC<{
           flexDirection: "row",
           flexWrap: "wrap",
           filter: choice.isRemoved ? "brightness(0.4)" : undefined,
+          backgroundColor: theme.palette.background.paper,
         }}
       >
         {choice.candidates.map((trial_num, index) => (