ChatColor.cs

using System;
using System.Collections.Generic;
using System.Drawing;

namespace Minecraft.Component;

public sealed class ChatColor
{
    private static readonly Dictionary<string, ChatColor> Colors = new Dictionary<string, ChatColor>();

    public static readonly ChatColor Black = CreateWithName("black");
    public static readonly ChatColor DarkBlue = CreateWithName("dark_blue");
    public static readonly ChatColor DarkGreen = CreateWithName("dark_green");
    public static readonly ChatColor DarkAqua = CreateWithName("dark_aqua");
    public static readonly ChatColor DarkRed = CreateWithName("dark_red");
    public static readonly ChatColor DarkPurple = CreateWithName("dark_purple");
    public static readonly ChatColor DarkGray = CreateWithName("dark_gray");
    public static readonly ChatColor Gold = CreateWithName("gold");
    public static readonly ChatColor Gray = CreateWithName("gray");
    public static readonly ChatColor Blue = CreateWithName("blue");
    public static readonly ChatColor Green = CreateWithName("green");
    public static readonly ChatColor Aqua = CreateWithName("aqua");
    public static readonly ChatColor Red = CreateWithName("red");
    public static readonly ChatColor LightPurple = CreateWithName("light_purple");
    public static readonly ChatColor Yellow = CreateWithName("yellow");
    public static readonly ChatColor White = CreateWithName("white");
    public static readonly ChatColor Reset = CreateWithName("reset");

    private readonly string name;

    private ChatColor(string name)
    {
        this.name = name;
    }

    private static ChatColor CreateWithName(string colorName)
    {
        var output = new ChatColor(colorName);
        Colors[colorName] = output;
        return output;
    }

    public override string ToString()
    {
        return name;
    }

    public static ChatColor FromColor(Color color)
    {
        return new ChatColor($"{color.R:X2}{color.G:X2}{color.B:X2}");
    }

    public static ChatColor FromRgb(byte r, byte g, byte b)
    {
        return FromColor(Color.FromArgb(r, g, b));
    }

    public static ChatColor FromHexadecimal(string name)
    {
        var length = name.Length;
        var correctLength = name[0] == '#' ? 7 : 6;

        if (length != correctLength)
        {
            throw new InvalidOperationException("Invalid hexadecimal code");
        }

        return new ChatColor(name);
    }

    public static ChatColor FromName(string name)
    {
        if (Colors.TryGetValue(name, out var color))
            return color;

        throw new KeyNotFoundException();
    }
}