"Philips Hue is your personal wireless lighting system that lets you easily control your light and create the right ambiance for every moment." - https://www2.meethue.com
Siri knows the names of all of the X11 colors
- Enabling the hidden Wi-Fi radio on the Philips Hue Bridge 2.0: Adventures with 802.11n, ZigBee 802.15.4 and OpenWrt
- https://arantius.github.io/web-color-wheel: Color wheel of named colors, which can all be used to set your hue light colors using Siri.