How to configure a rule condition on color state in OH3 - Web-Interface?

[rossko57]

@Nears

How would I do that?

Autoupdate is a configurable option on each individual Item. You edit your Item.

Fuller background for context -

Autoupdate - a primer

I’ve found myself having to investigate and/or explain some of the features of autoupdate over time, and thought an in-depth view would be helpful. These notes apply to openHAB version 2.5 Overview Autoupdate is primarily a “speed up” feature for openHAB Items. Mostly we can ignore it, but sometimes you may get an unwanted or unexpected effect, or you may wish to exercise more control. To fully understand autoupdate, we must understand the difference between command and state of Items. If w…

@Nears

Or is there a way to also read the “GUI” values

It’s very important to understand the distinction between commands (“do something”) and state (“it’s like this”).
There may no relation between commands and states, e.g. command OFF to a Dimmer will usually result in state 0%.
Users poking UI buttons results in commands.

Think carefully about which you want to look at in rules, seeing as they are cause and effect. It’s your choice for triggering, then within the rule you can examine either.