diff --git a/app/src/main/java/com/example/citrusclient/Citrus.java b/app/src/main/java/com/example/citrusclient/Citrus.java
index 07637ce..c9bd0fc 100644
--- a/app/src/main/java/com/example/citrusclient/Citrus.java
+++ b/app/src/main/java/com/example/citrusclient/Citrus.java
@@ -13,6 +13,7 @@
     private Integer curDay;
     private String curLookingAccountId;
     private Integer curLookingBookId;
+    private String accountColor;
     //getter
     public String getToken(){
         return token;
@@ -26,7 +27,7 @@
     public Integer getCurDay(){return curDay;}
     public String getCurLookingAccountId(){return curLookingAccountId;}
     public Integer getCurLookingBookId(){return curLookingBookId;}
-
+    public String getAccountColor(){return accountColor;}
     //setter
     public void setToken(String token){
         this.token = token;
@@ -40,4 +41,5 @@
     public void setCurDay(Integer curDay){this.curDay = curDay;}
     public void setCurLookingAccountId(String curLookingAccountId){this.curLookingAccountId = curLookingAccountId;}
     public void setCurLookingBookId(Integer curLookingBookId){this.curLookingBookId = curLookingBookId;}
+    public void setAccountColor(String accountColor){this.accountColor = accountColor;}
 }
diff --git a/app/src/main/java/com/example/citrusclient/rest/AccountsRest.java b/app/src/main/java/com/example/citrusclient/rest/AccountsRest.java
index 0941f37..007d4ea 100644
--- a/app/src/main/java/com/example/citrusclient/rest/AccountsRest.java
+++ b/app/src/main/java/com/example/citrusclient/rest/AccountsRest.java
@@ -1,10 +1,14 @@
 package com.example.citrusclient.rest;
 
+import dalvik.annotation.optimization.FastNative;
 import retrofit2.Call;
+import retrofit2.http.DELETE;
 import retrofit2.http.Field;
 import retrofit2.http.FormUrlEncoded;
 import retrofit2.http.POST;
+import retrofit2.http.PUT;
 import retrofit2.http.Path;
+import retrofit2.http.Query;
 
 public interface AccountsRest {
 
@@ -27,4 +31,44 @@
             @Path("account_id") String account_id,
             @Field("password") String password
     );
+
+    //仮
+    //パスワード変更
+    @FormUrlEncoded
+    @PUT("accounts/{account_id}/password")
+    Call<String> changePW(
+            @Path("account_id") String account_id,
+            @Field("new_password") String new_password,
+            @Field("old_password") String old_password,
+            @Field("token") String token
+    );
+
+    //仮
+    //アカウント削除
+    @FormUrlEncoded
+    @DELETE("accounts/{account_id}")
+    Call<String> deleteId(
+            @Path("account_id") String account_id,
+            @Query("token") String token,
+            @Query("password") String password
+    );
+
+    //仮
+    //アカウントカラー変更
+    @FormUrlEncoded
+    @PUT("accounts/{account_id}/accountColor")
+    Call<String> changeColor(
+            @Path("account_id") String account_id,
+            @Field("accountColor") String accountColor,
+            @Field("token") String token
+    );
+
+    @FormUrlEncoded
+    @PUT("accounts/{account_id")
+    Call<String> changeAccount(
+            @Path("account_id") String account_id,
+            @Field("new_account_id") String new_account_id,
+            @Field("old_password") String old_password,
+            @Field("token") String token
+    );
 }
diff --git a/app/src/main/java/com/example/citrusclient/viewmodels/SettingsViewModel.java b/app/src/main/java/com/example/citrusclient/viewmodels/SettingsViewModel.java
new file mode 100644
index 0000000..022b6ef
--- /dev/null
+++ b/app/src/main/java/com/example/citrusclient/viewmodels/SettingsViewModel.java
@@ -0,0 +1,116 @@
+package com.example.citrusclient.viewmodels;
+
+import com.example.citrusclient.Citrus;
+import com.example.citrusclient.rest.AccountsRest;
+
+import androidx.lifecycle.ViewModel;
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
+import retrofit2.Retrofit;
+import retrofit2.converter.jackson.JacksonConverterFactory;
+
+public class SettingsViewModel extends ViewModel {
+    private final Retrofit retrofit;
+    private final AccountsRest accountsRest;
+
+    private Citrus citrus;
+
+    public SettingsViewModel(){
+        retrofit = new Retrofit.Builder()
+                .baseUrl("http://nitta-lab-www.is.konan-u.ac.jp/citrus/")
+                .addConverterFactory(JacksonConverterFactory.create())
+                .build();
+        this.accountsRest = retrofit.create(AccountsRest.class);
+    }
+
+    //なんちゃって通信ver1
+    //PW変更時のサーバ通信プログラム
+    public void changePW(String accountId, String old_password, String new_password,String token){
+        Call<String> call = accountsRest.changePW(accountId,old_password,new_password,token);
+        call.enqueue(new Callback<String>() {
+            @Override
+            public void onResponse(Call<String> call, Response<String> response) {
+                if (response.isSuccessful()) {
+                    System.out.println("success");
+                    //成功処理
+                } else {
+                    System.out.println("fail");
+                }
+            }
+
+            @Override
+            public void onFailure(Call<String> call, Throwable t) {
+                System.out.println("NetWorkError"+t);
+            }
+        });
+    }
+    //通信ver2
+    //アカウント削除
+    public void deleteId(String accountId, String token, String password){
+        Call<String> call =accountsRest.deleteId(accountId,token,password);
+        call.enqueue(new Callback<String>() {
+            @Override
+            public void onResponse(Call<String> call, Response<String> response) {
+                if(response.isSuccessful()){
+                    System.out.println("success");
+                    //成功処理
+                }else{
+                    System.out.println("fail");
+                    //もしコンソール表記をするならこの下に処理を記載
+                }
+            }
+
+            @Override
+            public void onFailure(Call<String> call, Throwable t) {
+                System.out.println("NetWorkError"+t);
+                //もしコンソール表記をするならこの下に処理を記載
+            }
+        });
+    }
+
+    //通信Ver3
+    //色変更
+    public void changeColor(String accountId,String accountColor, String token){
+        Call<String> call =accountsRest.changeColor(accountId,accountColor,token);
+        call.enqueue(new Callback<String>() {
+            @Override
+            public void onResponse(Call<String> call, Response<String> response) {
+                if(response.isSuccessful()){
+                    System.out.println("success");
+                    citrus.setAccountColor(accountColor);
+                }else{
+                    System.out.println("fail");
+                }
+            }
+
+            @Override
+            public void onFailure(Call<String> call, Throwable t) {
+                System.out.println("NetWorkError"+t);
+            }
+        });
+    }
+
+    //通信Ver4
+    //アカウント名変更
+    public void changeAccount(String accountId,String accountColor, String token){
+        Call<String> call =accountsRest.changeColor(accountId,accountColor,token);
+        call.enqueue(new Callback<String>() {
+            @Override
+            public void onResponse(Call<String> call, Response<String> response) {
+                if(response.isSuccessful()){
+                    System.out.println("success");
+                    citrus.setAccountId(accountColor);
+                }else{
+                    System.out.println("fail");
+                }
+            }
+
+            @Override
+            public void onFailure(Call<String> call, Throwable t) {
+                System.out.println("NetWorkError"+t);
+            }
+        });
+    }
+
+}
diff --git a/app/src/main/java/com/example/citrusclient/views/SignUpActivity.java b/app/src/main/java/com/example/citrusclient/views/SignUpActivity.java
index 4b492b3..926957b 100644
--- a/app/src/main/java/com/example/citrusclient/views/SignUpActivity.java
+++ b/app/src/main/java/com/example/citrusclient/views/SignUpActivity.java
@@ -66,7 +66,6 @@
         this.accountsRest = retrofit.create(AccountsRest.class);
 
 
-
         findViewById(R.id.button_signup).setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View view) {
@@ -103,6 +102,7 @@
                                 String token = response.body();
                                 citrus.setToken(token);
                                 citrus.setAccountId(id);
+                                citrus.setAccountColor("#D5D5D5");
 
                                 //画面遷移
                                 handler.post(new Runnable() {