Name: Lori
Message: Hello--I want to dye a very nice "dry clean only" suit to wear to my daughters wedding. It's light pink and I want it plum. Is there such a thing as cold water dye that won't wreck the suit? The suit will only be worn for one day, so if it doesn't hold the color I won't be upset. I have dyed fabric in the past, but never a dry clean only suit.

No, sorry, there is no way to dye anything without washing it. The best way to get an overall single color, in fact, is by using repeated cycles on a washing machine.

If you wash the suit and it survives, then you can dye it with cold water fiber reactive dye, such as Procion MX dye, if it is made of cotton, linen, rayon, hemp, or tencel. All-purpose dye, such as Rit brand dye, is only temporary if applied in warm water (instead of very hot water), but seems that even this temporary effect could meet your needs, if the suit can be washed without damage.

However, there is no way to apply any dye if the suit is truly dry clean only. You simply have to use water to apply the dye, as well as to remove the excess dye afterwards.