It depends on what you want to make and the tie dye design and look you’re going for. If you want to tie dye the fabric a darker color, we recommend using a tie-dye color within the same color family as the existing color on the fabric (i.e. from Light Pink to Fuchsia). Any color outside of the color family may turn muddy or brown. Bleaching out the colored fabric before tie dyeing will not completely remove the base color and may not create better results when tie dyeing. But to make it really easy, try using one of our Tulip Reverse Dye Kits for great results!