Color Square Escape

This city is new to you. You have come here searching for a job. Your uncle who has a house in the city has given you the address and the permission to stay in the house that otherwise used to be locked. Entering the house you discovered that it was just perfect for you to spend your days in the city until you get the job and get another house on rent. After spending the night inside the house you decide to go to the office for the interview but you cannot open the door and nor do you see any other possible exit. You have got to search for clues and objects before using them to escape from there.