Pop your corn according to package instructions. Place in a bowl and set aside.
Rip a sheet of waxed paper (about 8" – 10' long) and place on your counter.
Melt butter and brown sugar on the stove on medium heat. Stir frequently to avoid scorching.
Pour in the Skittles candies. Stir until melted (you might need to mash them down to help them dissolve). Add food coloring if you desire more color.
Once done melting pour the hot candy mixture over the top of the popcorn.
Use a spatula and fold in the mixture throughout the popcorn until will covered.
Dump the popcorn onto the waxed paper and spread thinly to allow to cool.
If you wish to make popcorn balls, allow mixture to cool for 3 – 4 minutes (or until you can touch it). Then, spray cooking spray or butter your hands and form the popcorn into balls shapes. Set aside.