Try this: "Ok Google, sync my lamps".
With "Ok Google, switch [name of room/name of lamp] to [colour]" you can change them. If you have synchronised Google Home and the Philips Hue app with the command "Ok Google, sync my lamps", you can even apply entire scenes to adjust the lighting mood in one go. You can then activate your existing scenes in the Hue app with the command "Ok Google, switch on [scene name] in [room name]".