Preheat the oven to 350 F. In a medium bowl, whisk together flour, salt, and baking soda. In a large bowl, combine butter with sugar until fluffy. Add in the egg and vanilla extract, and mix until smooth.
Add in the flour mixture, and mix until it is fully combined. Place half of the cookie dough into another bowl. Mix blue food coloring into one bowl, and the green food coloring into the other bowl.
Mix 1/2 cup chocolate chips into each bowl. In a shallow dish, combine granulated sugar and ground cinnamon. Take a small amount of each cookie dough and roll together into a ball. Roll each one into the cinnamon sugar mixture and place onto a large ungreased baking sheet at least 2-inches apart. Bake for 10-12 minutes.
