Don't forget that if you use it, make sure you wash the clothes you dyed separate for a few washings.
Your wife will be happier, and you will be too. Of course, you'll be happier because she isn't mad about the new hue all the laundry took on.
Personally, I like dark gray pink, and dark gray blue, and dark gray white, etc.
At least she isn't upset about the dark gray black clothes.