You can use vinegar to lighten your hair. Here's a helpful link with instructions: www.ehow.com
Your question is a little confusing. You can not use only vinegar to dye your hair. However, vinegar can be used for getting a better dye. You can rinse your hair with a mixture of white vinegar and water (in equal quantities), immediately after coloring. Put this mixture for a minute or two and then rinse with plain water. This will let the color remain longer.