This may sound horrid..but i recently successfully bleached some blue batik bc i wanted shades of that color. It worked very well but one batch became white as snow with some dots of blue. Of course it was diluted by about a 1:1 ratio and the batik will lose its color almost immediately so you need to monitor it closely but this is definitely an option especially if you see an almond or even beige/khaki that appeals. It was fun. I was able to get gradated blues out of one fabric for a sky background for a mini quilt.