Creative switching for bathroom accent lights — 2-way and 3-way together?

DIWhy

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I’m thinking about a down-to-the-studs bathroom remodel. (Thinking, as I tell my wife, is free.) I would like to install dimmable LED accent lighting. I’m trying to avoid requiring the everyday user to flip two switches to turn on both the main lights and the accent lights … BUT I also want to give more advanced users different accent lighting options. Specifically, three modes: “normal” (switched with main switch), “night light” (on even when main switch is off), and “always off” (for people who don’t like accent lights). I would like one main SPST switch to control all normal bathroom lighting (including the LED lighting in “normal” mode).

To accomplish this, I’m thinking of installing a 3-way dimmer switch—the kind with a toggle and a slider—on an accent wall near the toilet. (Use of this switch would not be required of the everyday user.) The dimmer switch’s output terminal would control the accent lighting. One of the two input terminals would be wired to a black, always-hot wire, so the switch being up would activate “night light” mode. The other input terminal would be wired to the red, switched-hot wire from the main light switch, so the switch being down would activate “normal” mode. The “always off” mode could be (almost?) accomplished by sliding the slider all the way down.

Would this work? Is it okay to not to have a positive “off” switch (just low dim) for LED accent lights? Is this otherwise a bad idea?
 
Instead of switches with dimmer could do this with Alexa or eco dot. Then you don't have the possibility of a back feed into the dimmer. Why would u think a person wouldn't touch the mood lighting switch while visiting the toilet. Here just some of the smart switches look.at the 4 & 5 way
 
Instead of switches with dimmer could do this with Alexa or eco dot. Then you don't have the possibility of a back feed into the dimmer. Why would u think a person wouldn't touch the mood lighting switch while visiting the toilet. Here just some of the smart switches look.at the 4 & 5 way
I was hoping to avoid smart switches, if possible. If this would work, it would accomplish my goals without one ... I think?
 
Here's a diagram that might make my idea clearer.

Bathroom Switch Diagram Idea.png


To recap, the desired functionality of the dimmer switch is:
- Toggle on: Accent lights always on
- Toggle off: Accent lights switched with main lights
- Dimmer: Dims accent lights, if on ... may dim them to nothing, if user dislikes accent lights
 
If you use wall switch or covers with reciprocal night lights covers then the problem night light problem goes away.
Post one you want spst switch to control main lighting then you want another by the toilet switch to dim both accent and main lighting?
 
If you use wall switch or covers with reciprocal night lights covers then the problem night light problem goes away.
Post one you want spst switch to control main lighting then you want another by the toilet switch to dim both accent and main lighting?
No, the dimmer only dims the accent lighting. The idea of the “always on” setting is that it would look cool to have accent lights on throughout the bathroom, rather than in just one spot. Just wondering if that violates any rules or is otherwise a bad idea.
 
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