What Causes Swelling In Knee Along With Discoloration?

I fell of a chair lift two weeks ago. My left knee was swollen,but no pain and was able to move my leg,except the inside of knee feels tight. Two weeks later,the swollen is going down...skin is turning lite yellow and little bbit blue. I am walking better,except inside the knee feels stiff and tight. I have been soaking in the warm bath with baking soda and then rub on Bengal and try to elevate my leg after standing too long. Will I be playing tennis in the future or skiing? Thank you, YYYY@YYYY