I have used material dye but its honestly a waist if time. Once the cheaper ones turn reddish the material is really starting to get weak. Rips and tears will soon follow. Keep in mind, deer are color blind so it really shouldn't matter for you- especially if you are brushing the blind in. I did have one friend that attached material to his old blind to make it sort of a Ghillie suit blind. Looked cool but didn't perform any better really. Blind placement and brushing them in well are the two ingredients for success to me.