I colored my hair last night and hate it! My husband hates it! I was wondering what would happen if I buy a new color and dye it today?

You can re-color your hair right away if it's in good condition to fix the mistake. Most permanent color uses peroxide (10 to 40 vol.) and ammonia, which can be harsh on your hair. When using a permanent hair color, you should color your hair only every 4-6 weeks to prevent damaging your hair.