During a crazy weekend of paintball, four friends were having great fun. The paint came in blue, green, yellow and red. Coincidentally, the four friends had T-shirts in those same colours.

Brenda used blue paint balls.
The person in the green T-shirt used yellow paint balls.
James was not wearing a red T-shirt.
Diane used green paint balls and wore a blue T-shirt.
Simon was the only person who used paint which was the same colour as his T-shirt.

Can you tell which colour paint they each used and the colour of their respective T-shirts?