So there are light bulbs whose color temperature can be changed? Do you then need another actuator besides the dimmer actuator for changing the color temperature, or how is that technically realized? I find that very useful for the office and the living and dining area. For the other areas, I think it is sufficient to choose one color.
Yes, there are. It's called tunable white. Available as spots and strips. For that, you need the corresponding dimmer actuator (e.g., KNX) and assign two channels instead of one.
Or you use a standalone solution like Philips HUE.
We were just at Light&Building and noticed the company Lumitech. Especially in the area of HCL, a very, very interesting, but also not exactly cheap, option.