Martha Stewart Dyes Her Hair Pink With Help of Celeb Stylist Chris Appleton

Martha Stewart's gone from chardonnay to rosé ... trading in her distinguished silver locks for a new pink hairstyle!

The businesswoman -- who turned 85 just last week, BTW -- appeared in a new vid posted by celebrity stylist Chris Appleton in which she mouthed audio from "The Devil Wears Prada" telling Chris to get to work.

He certainly did ... dying her hair a light pink color -- and writing in the post's caption, "Welcome to the rose gold era 🌹✨."

CA followed it up with a couple pics of Martha smoldering for the camera ... and he used her signature catchphrase "It’s a good thing" to describe the look.

This new look is sure to turn some heads ... which is just fine with Martha -- given she just told PEOPLE she loves the single life.

She told the outlet she goes out a lot ... constantly seeing "friends" -- though it's unclear if she's dating at all.