Styles.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Media;

namespace FLY.ControlLibrary.Themes
{
    public static class Styles
    {
        static List<SolidColorBrush> randomColors;
        static List<SolidColorBrush> randomColorsDark;
        public static List<SolidColorBrush> AreaColors;
        static Styles()
        {

            ResourceDictionary resourceDictionary = new ResourceDictionary() { Source = new Uri("pack://application:,,,/FLY.ControlLibrary;component/Themes/Colors2.xaml") };

            AreaColors = new List<SolidColorBrush>();
            for (int i = 0; i < 5; i++)
                AreaColors.Add(resourceDictionary[$"Brushes.Area{i}"] as SolidColorBrush);

            randomColors = new List<SolidColorBrush>();
            randomColors.AddRange(resourceDictionary["Brushes.Random"] as IEnumerable<SolidColorBrush>);

            randomColorsDark = new List<SolidColorBrush>();
            randomColorsDark.AddRange(resourceDictionary["Brushes.Random.Dark"] as IEnumerable<SolidColorBrush>);
            //randomColors = new SolidColorBrush[] {
            //    new SolidColorBrush((Color)ColorConverter.ConvertFromString("#2195f2")),
            //    new SolidColorBrush((Color)ColorConverter.ConvertFromString("#f34336")),
            //    new SolidColorBrush((Color)ColorConverter.ConvertFromString("#fec007")),
            //    new SolidColorBrush((Color)ColorConverter.ConvertFromString("#607d8a")),
            //    new SolidColorBrush((Color)ColorConverter.ConvertFromString("#e81e63")),
            //    new SolidColorBrush((Color)ColorConverter.ConvertFromString("#4cae50")),
            //    new SolidColorBrush((Color)ColorConverter.ConvertFromString("#3f51b4")),
            //    new SolidColorBrush((Color)ColorConverter.ConvertFromString("#ccdb39"))
            //};

            //AreaColors = new SolidColorBrush[] {
            //    new SolidColorBrush((Color)ColorConverter.ConvertFromString("#f34336")),
            //    new SolidColorBrush((Color)ColorConverter.ConvertFromString("#fec007")),
            //    new SolidColorBrush((Color)ColorConverter.ConvertFromString("#4cae50")),
            //    new SolidColorBrush((Color)ColorConverter.ConvertFromString("#2195f2")),
            //    new SolidColorBrush((Color)ColorConverter.ConvertFromString("DarkSlateBlue"))
            //};
        }

        /// <summary>
        /// 获取随机颜色
        /// </summary>
        /// <param name="index"></param>
        /// <returns></returns>
        public static Brush GetForeground(int index, bool isDark = false)
        {
            if(isDark)
                return randomColorsDark.ElementAt(index % randomColorsDark.Count());
            else
                return randomColors.ElementAt(index % randomColors.Count());
        }
    }
}