On my monitor, they look gray/ green.

Found this photo in The Vandorf project page on the Ashley Montgomery Design website (using Google's image search) - perhaps you can contact them and ask.

Yes, it's a kitchen designed by Ashley Montgomery. Here are a couple more photos. There are no credits given, so you would have to contact the designer, or use the photos as your inspiration to find a similar cabinet color paint.

Edited to add: someone on her IG page said the base cabinet color is Farrow & Ball "Cromarty". The uppers are Benjamin Moore Swiss Coffee OC-45. Keep in mind that paint colors can look very different in different homes and different rooms.