maki/Maki/DiscordColour.cs

using System;
using System.Globalization;

namespace Maki
{
    public class DiscordColour
    {
        public DiscordColour(int raw)
        {
            Raw = raw;
        }

        public DiscordColour(byte red, byte green, byte blue)
        {
            Raw = (red << 16) + (green << 8) + blue;
        }

        public DiscordColour(string hex)
        {
            hex = hex.ToUpper();

            if (hex.Length == 3)
                hex = new string(hex[0], 2) + new string(hex[1], 2) + new string(hex[2], 2);

            if (hex.Length != 6)
                throw new FormatException("Invalid hex colour format!");
            
            Red = byte.Parse(hex.Substring(0, 2), NumberStyles.HexNumber);
            Green = byte.Parse(hex.Substring(2, 2), NumberStyles.HexNumber);
            Blue = byte.Parse(hex.Substring(4, 2), NumberStyles.HexNumber);
        }

        public int Raw = int.MinValue;

        public byte Red
        {
            get => (byte)(Raw >> 16 & 0xFF);
            set => Raw = (value << 16) + (Green << 8) + Blue;
        }

        public byte Green
        {
            get => (byte)(Raw >> 8 & 0xFF);
            set => Raw = (Red << 16) + (value << 8) + Blue;
        }

        public byte Blue
        {
            get => (byte)(Raw & 0xFF);
            set => Raw = (Red << 16) + (Green << 8) + value;
        }

        public string Hex => $"{Red:X2}{Green:X2}{Blue:X2}";
    }
}