If you have been warm, you most likely will grey in a warm manner, and suit warmer more taupe or greenish shades of grey. But that said, some people as they age change from warm to cool colouring, particularly as they go grey, they lose those warm pigments in their skin and hair and swap to the cool side of the undertone continuum.
If you are cool you will grey in a cool manner to a silver colour.
Greys differ, there are cooler and warmer versions, some are more blue or purple (cooler) whilst others are more green, yellow or brown (warm). Choose your grey wisely, as the right ones will look great, the wrong ones can sap you.
Remember, you can always wear a colour that is similar to your eye colour:
- Brown eyes, wear brown
- Blue eyes, wear navy
- Green eyes, wear olive or forest green (depending on your shade of green)
More information on the different kinds of greys and how to match grey with other colours check out this post.