Amazing chart that shows you how to make any color frosting using a standard red, yellow and blue box of dye and home made or store bought frosting! I don't use the liquid food coloring or store bought icing, but it's still useful info.
So machst du den allerbesten Stockbrotteig – mit und ohne Hefe
Cook spaghetti noodles, drain and cool. Fill a gallon Ziplock bag one quarter of the way with water. Add food coloring to the water. Add part of cooked spaghetti and mix around in the Ziplock bag until noodles change color. Drain, repeat with other colors