If the wash has stripped out the dye colour, then there's nothing you can do.

If the wash has made it kinda grey, you could try a quick soak in napisan, otherwise there are dye-run removers you can get at teh supermarket (make sure you use the one for COLOURED clothes or it will wreck it completely). We had grey front-loader clothes problems until we realised it's a feature of front-loaders that you only need a tiny amount of detergent, so using half a scoop followed by a vinegar rinse has worked for us.