C# Enum yapısındaki değerlerin sayısal karşılığı nasıl olur?

    static class Colors {
        public static class RGB {
            public static readonly RGBColor White = new RGBColor(255, 255, 255);
            public static readonly RGBColor Green = new RGBColor(0, 255, 0);
            public static readonly RGBColor Blue = new RGBColor(0, 0, 255);
            public static readonly RGBColor Red = new RGBColor(255, 0, 0);
            public static readonly RGBColor Yellow = new RGBColor(255, 255, 0);
            public static readonly RGBColor Cyan = new RGBColor(0, 255, 255);
            public static readonly RGBColor Brown = new RGBColor(150, 75, 0);
            public static readonly RGBColor Purple = new RGBColor(128, 0, 128);
            public static readonly RGBColor Orange = new RGBColor(255, 165, 0);
        }
        public enum HEX : int {
            White = 0xFFFFFF,
            Green = 0x00FF00,
            Blue = 0x0000FF,
            Red = 0xFF0000,
            Yellow = 0xFFFF00,
            Cyan = 0x00FFFF,
            Brown = 0x964B00,
            Purple = 0x800080,
            Orange = 0xFFA500
        }
    }