Bottom line is you don't want any actual switch wired to the Hue bulb. If you cut power to the Hue you won't be able to control it. A dimmer won't work for an additional reason. The Hue is rated for 100-240 volts. When you turn down the dimmer you will quickly drop below that 100 volts and end up with the same situation as turning off the power.
The simplest solution would be to add a Hue remote but they won't work with existing switch plates.
The solution I went with is using the Lutron Caseta dimmers and switches along with a Wink hub and Amazon Echo. (Yes, I have a bunch of systems hobbled together.)
My kitchen is a good example. It had two switches controlling the ceiling lights (task lights and center light). I replaced the task light switch with a Lutron dimmer so now it had a wall switch and smarts in one package. Next I hard wired the center light and removed the original switch. In its place on the wall I added a Lutron remote control.
In the light fixtures I put a Hue lamp in the center and regular LED (not smart) bulbs in the task lights. The Hue is always on and controlled as a normal smart light. The task lights are dumb bulbs that can be controlled at the wall switch or through your smart app. The buttons on the Lutron remote can be programmed (via Wink in my case) to do whatever I want - including turning the Hue on and off.
So one option is to hard wire the light with the Hue bulb and replace the switch with a Lutron remote. In that case the Hue will always have power and the remote will let your guests "manually" turn it on and off.
For reference the dimmer switch looks like this:
The remote looks like this:
I have both of those plus another dumb timer switch (exhaust fan) mounted in the three gang box that originally held the three toggle switches. So one toggle was replaced with a smart dimmer, one with a dumb timer, and one was wire nutted together (hard wired) and replaced with the remote.
I hope that makes some sort of sense.