But it looks like Kate has no intention of turning her back on the more modern trends she embraced during the warmer weather.
Middleton stopped by the Natural History Museum, of which she has been a patron since 2013, where she learned how the Angela Marmont Centre for UK Biodiversity is championing and helping to protect UK wildlife.
Besides Kate's gorgeous mix of earthy hues and jewel tone pieces, we also couldn't help but find ourselves drooling over her deep purple Chanel handbag.
Kate's hair appeared to have reddish tones on October 2.
The Duchess beamed as arrived at the Angela Marmont Centre for UK Biodiversity on Wednesday, to hear the map in which it is a ways serving to to provide protection to UK wildlife.
The duchess contrasted her summery locks with a chic outfit in an autumnal palette.
While visiting the centre, the 37-year-old royal toured the museum while observing the specimens on display and viewing DNA sequencing in action. HRH is Patron of the Natural History Museum.
The aim of the visit was to hear more about how it is championing and helping to protect United Kingdom wildlife, and was undertaken in her role as patron of the Natural History Museum.
Wanting to know more, the Royal was seen asking many questions while also looking interestedly at each thing she was shown.
"And now, as a parent myself, I'm experiencing the enjoyment in all places in the set up again with my have teens, who esteem coming right here - and it is no longer trusty to search the T-Rex, mind you".