examples/flutter_gallery/lib/demo/rally/colors.dart

// Copyright 2019-present the Flutter authors. All Rights Reserved.
//
// Licensed 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 'dart:ui';

/// Most color assignments in Rally are not like the the typical color
/// assignments that are common in other apps. Instead of primarily mapping to
/// component type and part, they are assigned round robin based on layout.
class RallyColors {
  static const List<Color> accountColors = <Color>[
    Color(0xFF005D57),
    Color(0xFF04B97F),
    Color(0xFF37EFBA),
    Color(0xFF007D51),
  ];

  static const List<Color> billColors = <Color>[
    Color(0xFFFFDC78),
    Color(0xFFFF6951),
    Color(0xFFFFD7D0),
    Color(0xFFFFAC12),
  ];

  static const List<Color> budgetColors = <Color>[
    Color(0xFFB2F2FF),
    Color(0xFFB15DFF),
    Color(0xFF72DEFF),
    Color(0xFF0082FB),
  ];

  static const Color gray = Color(0xFFD8D8D8);
  static const Color gray60 = Color(0x99D8D8D8);
  static const Color gray25 = Color(0x40D8D8D8);
  static const Color white60 = Color(0x99FFFFFF);
  static const Color primaryBackground = Color(0xFF33333D);
  static const Color inputBackground = Color(0xFF26282F);
  static const Color cardBackground = Color(0x03FEFEFE);

  /// Convenience method to get a single account color with position i.
  static Color accountColor(int i) {
    return cycledColor(accountColors, i);
  }

  /// Convenience method to get a single bill color with position i.
  static Color billColor(int i) {
    return cycledColor(billColors, i);
  }

  /// Convenience method to get a single budget color with position i.
  static Color budgetColor(int i) {
    return cycledColor(budgetColors, i);
  }

  /// Gets a color from a list that is considered to be infinitely repeating.
  static Color cycledColor(List<Color> colors, int i) {
    return colors[i % colors.length];
  }
}