Whether it is for the purpose of decoration or you need it for a costume, it is much easier and far more economical to make fake blood rather than purchase it. Most of the time you need red food colouring to make homemade fake blood, but there is a way you can make fake blood at home without food colouring. You can make a two-ingredient non-edible fake blood, or a three-ingredient that won't cause harm if swallowed.
Squeeze some dish soap into an empty bowl. Squeeze as much soap as you will need fake blood.
Add Red Berry Kool Aid to the bowl of dish soap slowly. Stir with a metal spoon. Keep adding Kool Aid until the soap has reached the desired shade of red.
Mix in a few drops of any flavour of blue Kool Aid to darken the red. This step is optional.
Pour one 473ml. bottle of Karo syrup into a mixing bowl.
Add 1 tsp of Black Raspberry Kool Aid powder to the bowl of Karo syrup. Stir the two ingredients with a metal spoon.
Measure 1/2 tsp of cocoa powder. Stir into the bowl of Karo and Kool Aid. Add additional cocoa if you want your blood to have a more textured appearance.