[GitHub] [beam] damondouglas commented on a change in pull request #15626: [BEAM-12963] [Playground] Create base Beam Playground page structure

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damondouglas commented on a change in pull request #15626:
URL: https://github.com/apache/beam/pull/15626#discussion_r719676377



##########
File path: playground/frontend/lib/config/colors.dart
##########
@@ -0,0 +1,28 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import 'package:flutter/material.dart';
+
+class LightColor {
+  static const Color primaryBackground = Colors.white;

Review comment:
       These comments are not blocking of the PR.
   
   One design pattern I've seen is to have a `constants.dart` file and begin constant variable names with `k...`.  For example:
   ```dart
   const kPrimaryBackground = Colors.white;
   ```
   
   Additionally, in dart, specifying the type before assignment is not needed.  One may write as:
   
   ```
   const kPrimaryBackground = Colors.white;
   ```
   
   instead of
   
   ```
   const Color kPrimaryBackground = Colors.white;
   ```
   
   I see the [TODO comment](https://github.com/apache/beam/pull/15626/files#diff-751203ee943c09f06c132849acb14e1005488cf2d1a375c6490de99d92c309ceR22) to add support for flutter themes.  I wonder when this TODO comment is addressed if a `final kLightTheme = ThemeData.from(...)` instead of using a class for color constants.
   




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