Definitely try Vicki's method that Peckish linked to. Has worked for me and many show quilters too! The key is lots and lots of water to dispurse and dilute the dye particles. If you have a low water usage washing machine that may have contributed to your initial bleed as the excess dye was able to settle on the other fabrics. It just shows the most on the white. Even if you can't get the bleed out, you should follow the advice of Jane Quilter.