diff --git a/src/main/java/org/ntlab/amaryllis/server/entities/Category.java b/src/main/java/org/ntlab/amaryllis/server/entities/Category.java
index 6c9997f..fdd70c4 100644
--- a/src/main/java/org/ntlab/amaryllis/server/entities/Category.java
+++ b/src/main/java/org/ntlab/amaryllis/server/entities/Category.java
@@ -5,8 +5,11 @@
 public class Category {
     private String cid;
     private String name;
-    private Color color;
-    public Category(String cid,String name,Color color){
+    /**
+     * 文字列表現された色情報
+     */
+    private String color;
+    public Category(String cid,String name,String color){
         this.cid=cid;
         this.name=name;
         this.color=color;
@@ -19,7 +22,7 @@
     public String getName() {
         return name;
     }
-    public Color getColor(){
+    public String getColor(){
         return color;
     }
     public void setCid(String cid) {
@@ -30,7 +33,7 @@
         this.name = name;
     }
 
-    public void setColor(Color color) {
+    public void setColor(String color) {
         this.color = color;
     }