diff --git a/lib/noosfero/api/entities.rb b/lib/noosfero/api/entities.rb
index 91462ff..8b47b48 100644
--- a/lib/noosfero/api/entities.rb
+++ b/lib/noosfero/api/entities.rb
@@ -43,6 +43,7 @@ module Noosfero
         expose :parent, :using => CategoryBase, if: { parent: true }
         expose :children, :using => CategoryBase, if: { children: true }
         expose :image, :using => Image
+        expose :display_color
       end
 
       class Region < Category
diff --git a/test/unit/api/articles_test.rb b/test/unit/api/articles_test.rb
index 08c0445..6240bf1 100644
--- a/test/unit/api/articles_test.rb
+++ b/test/unit/api/articles_test.rb
@@ -94,7 +94,7 @@ class ArticlesTest < ActiveSupport::TestCase
   expose_attributes = %w(id body abstract created_at title author profile categories image votes_for votes_against setting position hits start_date end_date tag_list parent children children_count)
 
   expose_attributes.each do |attr|
-    should "expose article #{attr} attribute" do
+    should "expose article #{attr} attribute by default" do
       article = fast_create(Article, :profile_id => user.person.id, :name => "Some thing")
       get "/api/v1/articles/?#{params.to_query}"
       json = JSON.parse(last_response.body)
diff --git a/test/unit/api/categories_test.rb b/test/unit/api/categories_test.rb
index 390c94f..279c36e 100644
--- a/test/unit/api/categories_test.rb
+++ b/test/unit/api/categories_test.rb
@@ -83,4 +83,15 @@ class CategoriesTest < ActiveSupport::TestCase
       json["categories"].map{ |c| c['children'].map{ |child| child['id'] }.sort  }
   end
 
+  expose_attributes = %w(id name full_name image display_color)
+
+  expose_attributes.each do |attr|
+    should "expose category #{attr} attribute by default" do
+      category = fast_create(Category, :environment_id => environment.id)
+      get "/api/v1/categories/?#{params.to_query}"
+      json = JSON.parse(last_response.body)
+     assert json["categories"].last.has_key?(attr)
+    end
+  end
+
 end
--
libgit2 0.21.2