Rethink and drop that one. You don’t need the fancy stuff under emergency conditions.
You actually also won’t want all your lights to be temp and color controllable (simply because that’s pricey and it’s sufficient to have one or two lights in a room to be of color).
And it is very hard to build particularly because you also need switches (input elements) to allow for controlling dimming, temp and color.
With ZWave modules you probably get closest to what you want. There’s dimmers and RGBW modules that allow for attaching external inputs (4x 0-10V for the latter) and I believe there’s switches on the market to allow for color input.
But temp control I have never seen a switch for.
There’s also the Shelly line of products to use WiFi but that’s a single vendor only at the moment to offer RGBW.
And don’t forget that all of this requires power so in case of a power outage you’re also out of luck despite of all the money you poured into a super-reliable solution.