diff --git a/src/main/java/com/fav/daengnyang/domain/account/controller/AccountController.java b/src/main/java/com/fav/daengnyang/domain/account/controller/AccountController.java
index 434ff7d..f1bdb35 100644
--- a/src/main/java/com/fav/daengnyang/domain/account/controller/AccountController.java
+++ b/src/main/java/com/fav/daengnyang/domain/account/controller/AccountController.java
@@ -41,9 +41,9 @@ public ResponseEntity<SuccessResponse<AccountResponse>> inquireAccount(
 
     @PatchMapping("/update-color")
     public ResponseEntity<SuccessResponse<AccountResponse>> updateCustomColor(
-            @RequestParam String accountNumber,
+            @AuthenticationPrincipal MemberPrincipal memberPrincipal,
             @RequestBody ColorUpdateRequest request) {
-        AccountResponse response = accountService.updateAccountColor(accountNumber, request.getNewColor());
+        AccountResponse response = accountService.updateAccountColor(memberPrincipal.getMemberId(), request.getNewColor());
         return ResponseEntity.ok(SuccessResponse.ok(response));
     }
 
diff --git a/src/main/java/com/fav/daengnyang/domain/account/repository/AccountRepository.java b/src/main/java/com/fav/daengnyang/domain/account/repository/AccountRepository.java
index 47518e2..4b7cd3f 100644
--- a/src/main/java/com/fav/daengnyang/domain/account/repository/AccountRepository.java
+++ b/src/main/java/com/fav/daengnyang/domain/account/repository/AccountRepository.java
@@ -8,10 +8,7 @@
 import java.util.Optional;
 
 public interface AccountRepository extends JpaRepository<Account, Long> {
-    Optional<Account> findByAccountNumber(String bankbookNumber);
-
     // memberId로 Account 조회
     @Query("SELECT b FROM Account b WHERE b.member.memberId = :memberId")
     Optional<Account> findByMemberId(@Param("memberId")Long memberId);
-
 }
diff --git a/src/main/java/com/fav/daengnyang/domain/account/service/AccountService.java b/src/main/java/com/fav/daengnyang/domain/account/service/AccountService.java
index f75a2ec..34122fa 100644
--- a/src/main/java/com/fav/daengnyang/domain/account/service/AccountService.java
+++ b/src/main/java/com/fav/daengnyang/domain/account/service/AccountService.java
@@ -95,8 +95,9 @@ public AccountResponse inquireAccount(Long memberId, String userKey) throws Json
     }
 
     // 커스텀 색상 업데이트
-    public AccountResponse updateAccountColor(String accountNumber, String newColor) {
-        Optional<Account> optionalAccount = accountRepository.findByAccountNumber(accountNumber);
+    public AccountResponse updateAccountColor(Long memberId, String newColor) {
+
+        Optional<Account> optionalAccount = accountRepository.findByMemberId(memberId);
 
         if (!optionalAccount.isPresent()) {
             throw new RuntimeException("해당 계좌 번호를 가진 계좌를 찾을 수 없습니다.");