I have a lot of blk skirt n instead of buying other color how do i change the color for example blue or white ect...any info will help n what do i need

Just buy some other colors.

x2 what Jig Man said. Skirt tabs really are very affordable. It's not worth screwing around with dye to make other colors. Also since you have black skirts, I don't know of anything that will turn them white. If it was the other way around then maybe Kool-aide or Ritt dye.