First I had to gather my supplies. I bought Rit powder dye in Royal Blue from Joanne's and picked up the white button up for a few bucks at a thrift store. The jeans are old and faded but I love the fit so I decided to dye them too.
-A bucket to dye items in
|I suggest you use gloves to avoid becoming a Smurf|
Dissolve your packet of dye in the hot water, less water = a more concentrated and darker color.
Now you need to pick out a tie dye pattern. Check out this great wikihow page for various tie dye patterns. I decided to just do a random pattern and just bunched up my shirt in a ball and added rubber bands. Than I dipped the entire shirt in the dye. The pants I just dunked in as well as I just wanted them darker, no pattern or rubber bands required.
After the fabric has soaked up the color, wrap your item in a plastic bag and set outside. The items won't necessarily dry in the bags but the heat and time will help the color set. I left my items out for several hours but there's no rule as to how long you need to leave them in plastic.
I had a lot of fun doing this project and there will definitely be more dyeing adventures for me in the future!