Port of UIColorMSHashExtension from Swift to C#. Office UI Fabric iOS for Xamarin.iOS

ColorExtensions.cs

using System;
using UIKit;

namespace XamarinOfficeUIFabric
{
    public static class ColorExtensions
    {
        // Original MS Source:
        // https://github.com/OfficeDev/office-ui-fabric-ios/blob/master/OfficeUIFabricCore/OfficeUIFabricCore/Core/Colors/UIColorMSHashExtension.swift
        public static UIColor MSHashColor(this string hash)
        {
            var randomNum = 3074457345618258791;

            var rgbRed = new nfloat[] { 0, 8, 16, 136, 180, 232, 218, 0, 0, 0, 168, 78 };
            var rgbGreen = new nfloat[] { 120, 130, 124, 23, 0, 17, 59, 111, 94, 78, 0, 37 };
            var rgbBlue = new nfloat[] { 215, 114, 16, 152, 158, 35, 1, 148, 80, 140, 0, 127 };

            foreach (var c in hash)
            {
                randomNum = randomNum + c;
                randomNum = randomNum * 3074457345618258799;
            }

            var index = randomNum % rgbBlue.Length;

            return UIColor.FromRGBA(
                red: rgbRed[index] / 255,
                green: rgbGreen[index] / 255,
                blue: rgbBlue[index] / 255,
                alpha: 1);
        }
    }
}