small burn on pink and white 100% cotton long sleeve shirt?

I have a katydid cotton long sleeve shirt. It is multicolored with pink and white. I burned a very small hole, not very big but noticeable. What would be the best way to mend this? I know my boyfriend fixed a burn that was quite a bit bigger on a car seat with a kit he got from auto zone. This was a kit where he had to mix colors to get the right one and had to use some type of screen to cover the hole. This is alot smaller but it is 100 cotton and pretty expensive shirt. I am just sick about this so please any ideas, suggestions would be helpful.