<li>
                @for (int i = 0; i < item.AnswersList.Count; i++)
                {
                    var answerArray = item.AnswersList[i].Output.ToArray();
                    var outputArray = item.OutputList[i].Output.ToArray();

                    for (int j = 0; j < answerArray.Length; i++)
                    {
                        if (answerArray[j] == outputArray[j])
                        {
                            @Html.Raw( How to print colorful char here?);
                        }
                    }
                }
            </li>