Thrifted a designer wedding dress for $40, added DyeMore and questioned my choices, but ended up with the dreamiest prom dress Ready to try this? Here's how: 1 Prewash your dress Dyeing clothing 3 different shades of green!, For the bikini: I used @ritdye DyeMore synthetic peacock green color. , For the overcoat and work set: I also dyed it with the bikini in the peacock How to dye a polyester dress black? would it be possible to dye this a deep red? it says it's 100% polyester : r dyeing