How long does it take for the blood to go red when you have just started your period?

Your period shouldn't be red. Your period blood should be a brownish-whitish colour. Anyway you should only loose about 2 teaspoons of blood during your whole period. make sure you wear sanitary pads or tampons to soak up the blood and don't be afraid to tell your mom, sister, auntie, cousin or grandma because they have all had it as well. If your period turns red I would contact a doctor.