Toggle switches with the Hue wall switch module are theoretically possible - Hueblog.com
The Philips Hue Wall Switch Module is now available - Hueblog.com
Amazon.com: Philips Hue White and Color Ambiance Appear Outdoor Wall Light Fixture - 1 Pack - Weatherproof - Requires Hue Bridge - Works with Amazon Alexa, Apple HomeKit and Google Assistant,Black : Everything Else